Editing Designs

While editing, keep in mind that most edit commands enable you to select the item(s) before you select the edit command, or vice versa. Take note also that many editing commands are repeating commands; that is, once the command is chosen, it remains active until another command is chosen or until it is explicitly canceled (Edit > End Command).
You will find it easier to edit your designs if you understand some of the features provided to assist you in selecting the item(s) you want to edit. Design entry and display preferences are described in the Setting Design Environment Preferences in the Customization and Configuration documentation.

Using the Undo Command

Selecting Undo (Ctrl+z) undoes the last editing command. A stack of edit commands is created enabling you to choose Undo repeatedly to return to an earlier state of your design. A stack is maintained for each window, thus the Undo command works independently from window to window. You can specify the number of commands you want the stack to hold through Options > Preferences > Entry/Edit, Undo edit count.

Deleting Items

To delete selected items, click the Delete button on the toolbar, or press the Delete key on the keyboard, or choose Delete from the Edit menu. Deleted items can be restored using the Undo command.

Activating, Deactivating, and Shorting Components

Use the following information to modify a design to include or exclude components without deleting them. Advanced Design System provides two ways to exclude items from a simulation: deactivating, and deactivating and shorting.

Activating and Deactivating Components

A deactivated component is excluded from the design during simulation. When a component is deactivated, a box with an X drawn through it is displayed over the component. The deactivated component text also appears in a gray color (default). The color of the deactivated component text can be changed using the Deactivated Component Text color defined through Options > Preferences > Display.

Note When a component is deactivated, it cannot be on-screen edited. However, you can still edit a deactivated component using the component parameter dialog box.

To deactivate or activate components:

1. Choose Edit > Component > Deactivate/Activate.
2. Select a component to switch its current state.
   Clicking an active component deactivates it and a box with an X drawn through it is displayed over the item. A deactivated item is excluded from a subsequent simulation.
   Clicking a deactivated component (shorted or not) reactivates it. The item is included in a subsequent simulation.

   Hint The color of the deactivation box is the Highlight color defined through Options > Preferences > Display.

   If you select more than one component and then invoke the Deactivate/Activate command, one of the following occurs:

• If all components were active, they get deactivated, and vice versa.
• If some of the selected components were activated while others were deactivated, all components get deactivated.

  Note When using the Generate/Update Layout command, instances that have been deactivated will not appear in layout. This includes instances that have been deactivated and shorted. To work around this problem it may be necessary to run Generate/Update Layout more than once, and select a starting instance on either side of the deactivated and shorted instance. The short will have to be manually added in layout if it is desired to simulate from layout.

Deactivating and Shorting Components

A deactivated and shorted component is interpreted as a short during simulation. When a component is deactivated and shorted a box with an X and a solid bar drawn through it is displayed over the component.

To deactivate and short components, or to activate components:

1. Choose Edit > Component > Deactivate and Short/Activate.
2. Click one or more components to switch their current states.
   Clicking an active component deactivates and shorts it. A box with an X and a solid bar drawn through it is displayed over the item. The item is interpreted as a short in a subsequent simulation.
   Clicking a deactivated component (shorted or not) reactivates it. The item is included in a subsequent simulation.

   Note If the component you have selected cannot be shorted, a message is displayed to let you know and the component is only deactivated.

   If you select more than one component and then invoke the Deactivate and Short/Activate command, one of the following occurs:

• If all components were active, they get deactivated and shorted, and vice versa.
• If some of the selected components were activated while others were deactivated, all components get deactivated and shorted.

  Note In Analog/RF designs, generally only components with two pins can be deactivated and shorted; other components are just deactivated (Exceptions to this two-pin rule are: S2P, S2P_Conn, S2P_Pad3, S2P_Spac, and Deembed2. When these components are deactivated and shorted, the short is created between pins 1 and 2.) The Deactivate and Short or Activate Components command is disabled for DSP designs. To be able to deactivate and short a custom component with more than two pins, refer to the instructions for the create_item() function in the AEL documentation.

Editing Component Parameters

There are several methods for changing component parameters. The simplest methods involve editing parameters for individual components:

• Using the on-screen editor
• Using the component parameter dialog box
  Additional methods that accommodate editing parameters in specific situations are:
• Searching for a particular parameter - a parameter whose value is stated as a reference to another component (Search/Replace Reference) - and then replacing that parameter throughout the design.
• Changing the value of a particular parameter common to components throughout the design (Group Edit Parameter Value).

  Note The at symbol (@) must be used to suppress quotes when specifying a variable, for example, @freq1, where freq1 is a variable declared in a VAR item.

Editing Component Parameters On-screen

You can use on-screen parameter editing to change parameter values. In addition, you can change the Value Type from nominal to variable, and vice-versa. If you need to change a parameter's Value Type to anything other than nominal or variable, refer to the next section, Editing Component Parameters Through the Dialog Box

Hint When you click the component name, you initiate the Swap Components command.

To edit one or more parameters for a component using the on-screen method:

1. Position the pointer over the parameter you want to change and click. The editable portion of the parameter takes on the current Highlight color (Options > Preferences > Display). You will also see that a vertical bar (|), representing a text insertion cursor, appears in the parameter line.
2. Use the mouse, arrow keys, and backspace key as necessary, to change the parameters.
3. To end the parameter editing command, move the pointer away from the component and click once (If the parameter is the last one in a list of parameters or is the only parameter for this component, pressing Return also ends the command.)

   Hint When editing several parameters for one component, you can click each individual parameter you want to edit, or you can press Return as many times as needed to get to the next parameter you want to edit. Pressing Return for the last parameter in the list ends the parameter editing command.

   Note that when you are on-screen editing component text that has tune, opt, stat or doe syntax in Short or None format, it will appear in Full format while on-screen editing. After editing is complete, the component text will continue to be in the format specified by the preference. For more information, refer to Setting Component Text/Wire Label Options (in Advance) under the Setting Design Environment Preferences section of the Customization and Configuration documentation.

Editing Component Parameters Through the Dialog Box

Despite variations for some components, certain basic guidelines apply to completing the component parameters dialog box for most components. Note the following features of this dialog box:

• The input fields change based on the individual parameter selected. For more information, refer to Understanding Standard Parameter Entry Mode.
• All variable entries are available by selecting the Equation Editor from the Edit Component dialog. For more information refer to Using the Equation Editor.
• A default ID for a given instance of a given component appears in the Instance Name field. This ID is unique for every component in the design. You can use the default name or supply any name of your choosing.
• Some parameters offer the ability to use data from a referenced data file. For details, refer to Components that Allow File-Based Parameters under the section on Creating Designs.
• You can turn the display of individual parameters on or off. You can also use Component Options to set or clear the display of all parameters for the component at once. For details, refer to the section on Changing the Visibility of Component Parameters on a Schematic.
• For details on Optimization/Statistics Setup, refer to Specifying Component Parameters for Optimization under the section on Performing Nominal Optimization in the Tuning, Optimization, and Statistical Design documentation.
• For the majority of ADS internal simulator components that are placed in a schematic, a simulation will automatically use the internal simulator defaults for component parameters with no value in their field. These parameters are not typically netlisted.

To edit one or more parameters for a component through the dialog box:

1. Choose one of the following methods for displaying the dialog box:
   • Choose Edit > Component > Edit Component Parameters and click the component symbol
   • Click the Edit Component Parameters button on the toolbar and click the component symbol
     
   • Double-click the component symbol
     

     Hint Use the following shortcut to edit parameters for most or all components: select everything in the drawing area (Select > Select All) and choose Edit > Component > Edit Component Parameters. Click Apply to accept parameter changes for one component, and another component is displayed for editing.

2. Select the parameter you want to change from the Select Parameter list box.
3. Type the new value in the parameter value editing field.
4. Press Return. The Parameters list box is updated to reflect the new value and the value of the next parameter is displayed for editing.
5. When you are through editing parameters, click OK to dismiss the dialog box.

   Note This dialog box will always display parameter values of tune, opt, stat or doe syntax in Full format even if the component text is displayed as Short or None on the schematic. After editing is complete, the component text will continue to be in the format specified by the preference. For more information, refer to Setting Component Text/Wire Label Options (in Advance) under the Setting Design Environment Preferences section of the Customization and Configuration documentation.

Changing the Visibility of Component Parameters on a Schematic

You can change the visibility status of all parameters of a given component through the Component Options dialog box (accessed through the component parameters dialog box).

• Set All - Displays all parameters for this component on the schematic. Use this option to display all, or almost all, parameters for this component. To display most - but not all - parameters, select Set All and then go back and turn off the display of individual parameters as desired.
• Clear All - Clears the display of all parameters for this component from the schematic. Use this option to turn off the display of all, or almost all, parameters for this component. To display a small subset of parameters, select Clear All and then go back and turn on the display of individual parameters as desired.

Referencing VAR Data Items and Model Items in Hierarchical Designs

The Scope option applies to the VAR (Variables and Equations) data item and most model items (such as R_Model, BJT_Model, BSIM3_Model). Exception: it does not apply to multi-layer models. Scope indicates the levels, from a hierarchical standpoint, that recognize the expressions defined in the VAR data item or model item.

• Nested-VAR or model item expressions are recognized within the design containing the VAR or model item, as well as within any subnetworks (designs at lower levels) referenced by the design containing the VAR or model item.
• Global-VAR or model item expressions are recognized throughout the entire design, no matter what level in the design hierarchy the VAR or model item is placed.

Editing Common Parameters for a Group of Items

The Group Edit Parameter Value command enables you to select a group of components with one or more common parameters, select a parameter that applies to them all, and change that parameter's value for all selected components.

To edit every occurrence of a parameter for selected components:

1. Select all components containing the parameter you want to edit.
2. Choose Edit > Component > Group Edit Parameter Value and a dialog box appears.
3. Click Name Options and a dialog box appears listing all parameters in your design by name.
4. Select the desired parameter from this list and click OK. The selected parameter appears in the Parameter Name field.
5. If the value type of the selected parameter is numeric, type the new value in the Parameter Value field; otherwise, click Value Options and a dialog box appears. The contents of the dialog box vary depending on the value type of the chosen parameter.

   Note You can only change the nominal value of the parameter, not the Value Type.

6. Select the desired parameter value and click OK.
7. Click Apply in the Group Edit Parameter Value dialog box (or click OK if you are through with this dialog box) and the design is updated accordingly.

Using the Equation Editor

The Equation Editor is a general purpose dialog box that enables you to access all of the variables defined in a particular design. You can access the Equation Editor from any standard component dialog box when the Standard Parameter Entry Mode is selected. For more information, refer to Understanding Standard Parameter Entry Mode.

Note For a list of available simulator functions, refer to the Simulator Expressions documentation.

To edit a variable equation:

1. Click a parameter to edit in the Select Parameter list box.
2. If available, set the Parameter Entry Mode to Standard in the component dialog box.

   Note The Standard Parameter Entry Mode is not available for all component parameters. If the Standard Parameter Entry Mode is not available, the Equation Editor is not available for that particular parameter. For more information, refer to Understanding Standard Parameter Entry Mode.

3. Click the Equation Editor button. The Equation Editor dialog box appears with the component parameter displayed on the left.
4. Select a variable from the Variables list box and then click the Insert button to add the variable to the component parameter entry field on the left. The variable selected appears in the parameter entry field. This field can be edited directly to use the selected variable in an equation.
5. Click OK to add the new equation to the component parameter.
6. Click OK or Apply in the component dialog box to initiate the change in the component.

Understanding Standard Parameter Entry Mode

A parameter defined to use a form set that includes a form of type StdForm will include the ability to use the Standard Parameter Entry Mode in the standard component dialog box. For more information on form sets, refer to Form Sets under the section on Creating New Component Definitions in the AEL documentation.

The Standard Parameter Entry Mode enables you to interact with the options shown below in Standard Parameter Entry Mode Options. These options can be used to set up the parameter's value.

Standard Parameter Entry Mode Options

• The parameter value field enables you to hand edit the value of the parameter. If the parameter's attribute value is set for this parameter to be not editable, then you will only be able to view the current value of the parameter in this field. For more information, refer to the create_parm() function's attribute choices in the AEL documentation.
• The parameter units drop-down list displays the current unit type selected for the parameter's value. This list of options is dependent on the parameter's unit type setting. For more information, refer to the create_parm() function in the AEL documentation.
• You can click the Equation Editor button to launch the Equation Editor dialog box. For more information, refer to Using the Equation Editor.
• You can click the Tune/Opt/Stat/DOE Setup button to launch the setup dialog box for Tuning, Optimization, Statistics, or Design of Experiments (DOE) settings. For more information, refer to the Tuning, Optimization and Statistical Design documentation.

  Note The Standard Parameter Entry Mode features described above are enabled or disabled uniquely for each parameter, depending on the parameter's attributes. For more information, refer to the create_parm() function's attribute choices in the AEL documentation.

Component Name Visibility in Schematic

Component names can become very long and can sometimes obstruct the view of other parts of your design. You can easily turn off your component's design name visibility in order to reduce the amount of clutter on your schematic. The visibility of a component's design name in a schematic window can be controlled through the following ways:

• Changing Component Name Visibility through the Edit Component Dialog Box
• Changing Component Name Visibility through the Edit Menu

Changing Component Name Visibility through the Edit Component Dialog Box

To change component name visibility through the Edit Component dialog box,

During component placement:

1. If the component dialog box is available during component placement, click the Component Options button and set the Display component name toggle.
2. Click OK to set the value to hide or display the component name.
3. Place the component in the schematic window.

During component editing:

1. Choose Edit > Component > Edit Component Parameters and click the component you would like to edit.
2. Click the Component Options button and set the Display component name toggle.
3. Click OK to set the value to hide or display the component name.
4. Click Apply in the Edit Component Parameter dialog box (or click OK if you are through with this dialog box) and the component should be updated.

Changing Component Name Visibility through the Edit Menu

To change component name visibility through the Edit menu:

1. Select the components whose component name you would like to hide or display.
2. Choose Edit > Component > Hide/Display Component Name.

Breaking Wire Connections Between Components

To break connections:

1. Select the component(s) with connections you want to break.
2. Choose Edit > Component > Break Connections. The interconnections of selected components are deleted.
   

Swapping Components

The Swap Components command enables you to select any number of components, with any number of ports, and replace them all with another component.

To swap components:

1. Select all components you want to replace.

   Hint Use the Select > Select By Name command to quickly select every component of a particular type.

2. Choose Edit > Component > Swap Components and a dialog box appears.
3. Click Select and the Component Library window appears.
4. Select the appropriate library and desired component. The component name appears in the New Component Name field of the dialog box.
5. Click Edit Parameters and the component parameters dialog box appears.
6. Change any parameters as desired and click OK.
7. To keep the IDs of the original components, select the option Keep the original component ID(s); to let the program replace the IDs with new ones, deselect this option. Click OK. All selected components in the design window are replaced by the new component with the specified parameters.

Searching and Replacing References

The Search/Replace Reference command enables you to replace every occurrence of a parameter value where that parameter value is a reference, such as a reference to a data item. For example, if your design contains two MSUB data items, MSUB1 and MSUB2, you can replace every reference to MSUB1 with a reference to MSUB2 instead. You can replace references to data items or variables.

To search and replace references to data items or variables in your design:

1. Choose Edit > Component > Search/Replace Reference and a dialog box appears.
2. Select the desired Reference Type, Component or Variable.
3. Under the heading Search For, click Select and a dialog box appears. The listing varies according to the selected reference type.

   Hint To highlight these references prior to replacing any, use the Search Only option and click Apply.

4. Select the Instance Name or Variable name representing the item you want to search for and click OK. The selected reference appears in the Search For field.
5. Under the heading Replace With, click Select.
6. Select the Instance Name or Variable name representing the desired replacement and click OK. The Replace With field is updated.
7. Click Apply (or OK if you are through with the Search/Replace dialog box). All occurrences of the selected reference are updated in your design.

Moving Component Text

You can reposition the component text, collectively, of any component with the Move Component Text command. In addition, you can change the layer assignment of individual pieces (Name, ID, Parameters) with the Change Component Text Layer command.

To move component text:

1. Choose Edit > Move > Move Component Text. You are prompted to enter a reference location.
2. Click the component whose component text you want to move. You are prompted to enter an offset location.
3. As you move the pointer, a ghost image representing the component text moves with it. Click again to reposition the component text in the new location.

   Hint The function key F5 initiates the Move Component Text command. Press F5, click the component symbol, move the pointer and a ghost image of the component text moves with it. Position the image in the desired location and click again to place it there.

To change the component text layer:

1. Choose Insert > Entry Layer and select the desired destination layer from the list.
2. Choose Edit > Component > Change Component Text Layer.
3. Click any individual piece (Name, ID, Parameters) of component text. Its layer is changed to the current entry layer and the component text immediately takes on the characteristics of the current entry layer.

   Note To change the layer on which component text is placed in advance of placing components, use Options > Preferences > Component Text/Wire Label to specify the desired layer for each type of component text.

Changing Component Text Attributes

You can change the attributes of existing component text through the Edit menu. This command only affects existing component text. To establish attributes for all subsequent component text, specify the desired settings through Options > Preferences > Component Text/Wire Label. For details on changing text you have added to your design, refer to Editing Existing Text and Text Attributes.

To change component text attributes:

1. Select the components whose component text you want to edit.
2. Choose Edit > Component > Component Text Attributes.
3. Make any desired changes to the text attributes.
   • Font Type - All True Type fonts (Schematic only) installed on your system are available. Select the desired font from the drop-down list.

     Note On UNIX, if you want to add additional True Type fonts that were not supplied with ADS, copy them to $HPEESOF_DIR/lib/fonts.

   • Point - Represents the size of text in traditional units used in printing.
   • Parameter Rows - The maximum number of rows of parameters before another column is created.
     
4. Click OK and the component text is immediately updated to reflect the changes.

Editing Symbol Pins

The Symbol Pin command enables you to change the name, number, and orientation angle of existing pins.

To edit characteristics of existing pins:

1. Select a pin for editing and choose Edit > Symbol Pin. A dialog box appears.
2. Change any of the characteristics as desired and click Apply (or click OK to accept the changes and dismiss the dialog box).
   For details on pin characteristics, refer to, Adding Pins to Your Symbol under the section on Working with Symbols.

Selecting and Deselecting Items

While you can always use the mouse to select and deselect items, several commands found on the Select menu can assist you in selecting and deselecting items more quickly.

Note Only objects on selectable layers can be selected for editing. If the select status (Sel) of a given layer is disabled (through the Layer Editor dialog box), the select commands have no effect on items on that layer.

Selecting/Deselecting All Items in the Drawing Area

To select all items in the drawing area:
Choose Select > Select All. Boxes are drawn around all items (that match the filter selection) showing that they are currently selected.

To deselect all selected items that match the filter selection:
Choose Select > Deselect All or click anywhere inside the window, away from the selected objects.

Selecting/Deselecting Items by Name

The commands Select By Name and Deselect By Name ignore the selection filters.

To select items by name:

1. Choose Select > Select By Name. A dialog box appears. By default, a list of each type of item in the design is displayed by Component Name. You can also view a list of individual items by selecting by Instance Name. The following illustration shows the listings of a simple network.
   
2. Select the desired list type and click the item(s) from the list that you want to select. Click Apply. The specified items are selected in the design window.
   

To deselect items by name:

1. Choose Select > Deselect By Name and a dialog box appears. By default, a list of each type of item selected in the design is displayed by Component Name. You can also view a list of individual selected items by selecting by Instance Name.
2. Select the desired list type and click the item(s) from the list that you want to deselect. Click Apply. The specified items are deselected in the design window.

   Hint Alternatively, you can use the wildcard field to filter the list for selected items of the same type. For example, to list all selected transmission lines in the design, type TLIN (for a listing by Component Name) or TL* (for a listing by Component ID), and click Apply.

Selecting/Deselecting With a Selection Window

You can include several objects at once for selection/deselection by enclosing them in a selection window.

To select items using a selection window:

1. Position the pointer at one corner of a window that will enclose the desired items, and press the left mouse button.
2. As you move the mouse, keeping the button depressed, a ghost image of the selection window is drawn. Release the button to specify the opposite corner of the window. All items totally enclosed within the selection window, that match the filter selection, are now selected and are identified by taking on the Select color chosen under Option > Preferences.

To deselect items using a selection window:

1. Choose Select > Deselect Area.
2. Draw a selection window enclosing the items you want to deselect. All items in the selection window (that match the filter selection) are deselected.

Using the Vertices Filter

By default, the Vertices filter is turned on. This means that when you use a selection window to encompass a portion of a given shape, the shape itself is not selected, but rather only the vertices that fall within the selection window. To modify this behavior so that individual vertices are not selected when you click an individual vertex or use a selection window, turn off the Vertices filter through Options > Preferences > Select.
The illustration that follows shows what happens when the Vertices filter is on, you draw a selection window enclosing parts of shapes on two different layers, and then choose Edit > Move > Move Using Reference.

Hint When the Vertices filter is turned on, all selected vertices are identified by a marker. You can change the size of this marker with the Selected Vertex option through Options > Preferences > Select.

Copying and Pasting Items

There are several Copy commands that enable you to copy and paste items in different ways:

• Cut - Enables you to delete one or more items from one window, and paste in another window.
• Copy - Enables you to copy items in a given design window and then paste those items within the same design window or another design window. On the PC only, it also copies the items to the Windows clipboard enabling you to paste the item(s) as a graphic in a Windows application.

  Hint To enable pasting the item using coordinates as the reference point, choose Options > Preferences > Entry/Edit and select the option Show Set Paste Origin Dialog for Copy command.

• Paste - Enables you to paste items that you previously cut or copied
  Advanced Copy/Paste
  • Copy Using Reference - Enables you to copy selected items, prompting for a reference point and a destination point. The copied items can then be placed anywhere within the same design window.
  • Copy Relative - Enables you to copy items a specified distance from the original items
  • Copy To Layer - Enables you to copy items from one layer to another, within the same design window
  • Step And Repeat - Enables you to create a copy in the form of an array, with the number of rows and columns you specify

To copy an item and paste it on the same layer:

1. Select the item(s).
2. Choose Edit > Copy (or click the Copy button on the toolbar).
   If you enabled the aforementioned option, Show Set Paste Origin Dialog for Copy command, a dialog box appears enabling you to specify a reference point for pasting (The default reference point for pasting a component, or group of components, is the first unconnected pin; when pasting shapes, the default reference point is the lower left corner.) Specify the X and Y coordinates (These are the positional coordinates identifying the position of the pointer in relation to the total window.) Click OK.
3. Choose Edit > Paste from the desired design window. As you move the pointer, a ghost image of the copied item moves with it.
4. Click again to specify the destination point.

To copy items using a reference point:

1. Select the item(s).
2. Choose Edit > Advanced Copy/Paste > Copy Using Reference.
3. You are prompted to enter a reference point. Click the point on the item (or group of items) you want to use as a reference point for positioning the copy.
4. You are prompted to enter the offset location. Click to place the item(s) in the desired location.

To create a copy in a specific position, relative to the selected item:

1. Select the item you want to copy.
2. Choose Edit > Advanced Copy/Paste > Copy Relative. A dialog box appears enabling you to specify the distance from the original that the copy should be placed.
   The values you specify here are with respect to the units of the window, schem or lay. For example, using the default inches of the Schematic window, if you supply 1.0 for both X and Y, the reference point of the copied item will be placed 1 inch in the direction of X and 1 inch in the direction of Y from the reference point of the original item.
   

   Hint The reference point on symbols is the first unconnected pin; the reference point on shapes is the lower left corner.

3. Specify the desired units in X and Y and click Apply. A copy appears at the specified location.

To copy from one layer and paste to another:

1. Select the item(s).
2. Choose Edit > Advanced Copy/Paste > Copy To Layer.
3. Select the desired destination layer from the dialog box that appears and click Apply.

   Important Clicking Apply enables you to continue copying items from the current layer to any other layer. If this is the only layer you want to copy the selected shape to, then click Cancel; if you click OK, you will paste an additional copy on the last layer selected.

The Step and Repeat command enables you to select an item or items you would like multiple copies of and then specify how many copies and how many rows and/or columns. This command also enables you to specify the distance between the items in X and Y coordinates.

To copy items using the Step and Repeat command:

1. Select the item or items you want to copy.
2. Choose Edit > Advanced Copy/Paste > Step and Repeat. A dialog box appears.
3. By default, the current snap spacing is displayed as the X and Y spacing in this dialog box. You can either accept the default spacing or change these numbers by typing or clicking the up and down arrows.
4. Specify the number of rows and columns by typing or by clicking the up and down arrows.
5. To automatically connect the pins of these items with one another, select the option Connect overlapping pins and change the X or Y spacing field to 0, based upon the component and the desired configuration.
6. Click Apply. As you move the pointer into the drawing area, a ghost image of the items moves with it. The lower left corner of the group serves as the reference point for placement.

   Hint The Step and Repeat command is a repeating command; you can place this same configuration as many times as you like. Or you can change the configuration each time and click Apply before placing.

   An illustration using a 2 × 4 array of BJTs is shown next.
   

Moving Items

The quickest way to move objects is with the mouse:

1. Position the pointer over the object(s) you want to move.

   Hint To move several items at once, select them using a selection window. To add additional items to (or delete items from) a selected group, use Shift+Click.

2. Press the left mouse button, drag to the new location, and release. When moving items using the drag method, the move must be more than the distance specified as the Threshold for it to be recognized as a move.
   
   This option (Options > Preferences > Entry/Edit) protects you from moving an item unintentionally if you click to select it and accidentally move the pointer.

There are several additional Move commands that enable you to move components and shapes in specific ways:

• Move Using Reference - Enables you to move selected items, prompting for a reference point and a destination point.
• Move Edge - Enables you to stretch the edge (between two vertices) of an existing shape.

  Hint This movement can be restricted by setting the option Maintain adjacent angles for Move Edge command.

• Move Relative - Enables you to move items by specifying coordinates, relative to 0,0.
• Move & Disconnect - Breaks connections as you move selected components.
• Move To Layer - Enables you to move items from one layer to another.
• Move Wire Endpoint - Enables you to manipulate an unconnected end of a wire.

To move items specifying the reference and destination locations:

1. Select the item(s) you want to move.
2. Choose Edit > Move > Move Using Reference. You are prompted to enter a reference location.
3. Specify a reference point by clicking the point on the item (or group of items) you want to use when specifying the destination. If you are moving component symbols, clicking a pin as a reference point will help you align and connect the items.
   As you move the mouse, a ghost image of the selected objects follows. You are prompted to enter an offset location.
4. Click again to place the items in the new location. Where applicable, wires are redrawn maintaining connections.

   Hint The manner in which wires are redrawn is controlled by the option Reroute entire wire attached to moved component.

To move an item a specific amount, relative to the coordinates 0,0:

1. Select the item you want to move.
2. Choose Edit > Move > Move Relative.
3. Specify the amount in X and the amount in Y (in inches) you want to move the selected object and click Apply. The item is moved, using the default reference point, by the specified amount.

   Hint The default reference point of an item varies depending on the nature of the item - for a component, it is pin 1; for a shape, it is the lower left corner.

To move and disconnect:

1. Select the items you want to move.
2. Choose Edit > Move > Move & Disconnect. You are prompted to enter a reference location.
3. Specify a reference point by clicking on or near the selected items. If you are moving component symbols, clicking on a pin as the reference point will help you align and connect the items.
   As you move the mouse, a ghost image of the selected items follows. You are prompted to enter an offset location.
4. Click again to place the items in the new location. The connections of the items moved and the items left behind, are deleted. The interconnections among the items moved, remain intact.

To move shapes or text to another layer:

1. Select the object you want to move.

   Note Do not use the Move To Layer command to move ports to a different layer; set the Layer parameter of the port to the desired layer.

2. Choose Edit > Move > Move To Layer. A dialog box appears with a list of currently defined layers. Select the desired layer and click OK. The selected object immediately takes on the color and other display characteristics of the selected layer.

   Note The following items can be moved to another layer using the context-sensitive menu that appears when you right-click with the pointer positioned over any of these items: Polygon, Polyline, Rectangle, Circle, Arc, Text, Arrow, Wire, Construction Line, Path, Trace.

Rotating Items

There are several commands to assist you in rotating components and shapes. The Advanced Rotate commands are more often used for shapes than components, but they do operate on components. For details on basic component rotation, refer to Rotating Components under the section on Creating Designs.

Use any of the following methods to rotate components and shapes by a specified increment:

• Click the Rotate By Increment button on the toolbar.
  
• Press Ctrl+r.
• Choose Edit > Rotate.

Each of these actions rotates the component n degrees clockwise, where n is the increment specified in Options > Preferences > Entry/Edit > Rotation Increment (angle). The default is 90 degrees.
The Mirror About X and Mirror About Y commands enable you to rotate objects across an axis you specify.

Advanced Rotate

• Rotate Around Reference enables you to rotate components and shapes using the mouse, specifying the reference point and the destination point.
• Rotate Relative enables you to rotate components and shapes by a specific number of degrees, relative to the 0,0 coordinates of the drawing area.
• Set Rotation Angle rotates the selected item by the number of degrees specified, in conjunction with the Rotate command. Note that setting this angle resets the Rotation Increment (angle) in Options > Preferences > Entry/Edit.

  Hint The Rotate and Rotate Around Reference commands can both be used on either components or shapes, but the Rotate command is typically better for working with components (the reference point is specified by the program) whereas the Rotate Around Reference command is typically better for working with shapes (you are prompted to specify the reference point around which to rotate).

Rotating Items Around a Specified Point

To rotate a selected object around a specified point:

1. Select the object.
2. Choose Edit > Advanced Rotate > Rotate Around Reference. You are prompted to enter a reference location.
3. Click once on the object at the point around which you want to rotate it. You are prompted to enter the offset location. As you move the mouse, a ghost image of the object moves with it. The pointer snaps in increments of the number of degrees specified in the Rotation Increment (angle) field in the Preferences dialog box (Options > Preferences > Entry/Edit).
4. Move the pointer until you are satisfied with the angle of rotation and click to place it.

Rotating Items in Degrees, Relative to 0,0

To rotate a selected object by a specific number of degrees, relative to 0,0:

1. Select the object.
2. Choose Edit > Advanced Rotate > Rotate Relative.
3. In the dialog box that appears, enter the number of degrees by which you want the object rotated.

   Hint Positive values rotate the object in a counterclockwise direction; negative values rotate the object clockwise. The reference point for rotating shapes is the lower left corner. The reference point for rotating components is the left-most pin 1. Values entered here are rounded up or down to the nearest incremental value in accordance with the number of degrees specified in the Rotation Increment (angle) field in the Preferences dialog box (Options > Preferences > Entry/Edit).

Rotating Objects Across a Specified X- or Y-axis

To rotate selected objects across a specified X-axis (mirror):

1. Select the object.
2. Choose Edit > Mirror About X. You are prompted to enter a point on the X-axis.
3. Click to specify the X-axis over which you want the object rotated. The selected object is rotated.
   

To rotate selected objects across a specified Y-axis:

1. Select the object.
2. Choose Edit > Mirror About Y. You are prompted to enter a point on the Y-axis.
3. Click to specify the Y-axis over which you want the object rotated. The selected object is rotated.
   

Rotating Objects Using an Absolute Angle

You can specify an absolute angle of rotation using the Set Rotation Angle command. This command is used in conjunction with the Rotate command.

Note The angle you specify here becomes the new Rotation Increment (angle) in Options > Preferences > Entry/Edit.

To rotate an object using an absolute rotation angle:

1. Select the object you want to rotate.
2. Choose Edit > Advanced Rotate > Set Rotation Angle. The Set Rotation Angle dialog box appears.
3. Specify the desired rotation angle in degrees.
4. Click Apply and click the Rotate button. The object is rotated by that amount.

Editing Shapes

There are several ways you can edit or manipulate various shapes after you have added them to your design:

• Converting Circles/Arcs to Simple Polygons
• Editing Polygons and Polylines
• Adding a New Vertex
• Moving a Vertex
• Deleting a Vertex
• Converting a Vertex to an Arc
• Converting a Vertex to a Mitered Edge
• Stretching a Wire or an Edge of a Shape
• Scaling an Object Using a Scaling Factor
• Scaling an Object Relative to the Design Window Units

Converting Circles/Arcs to Simple Polygons

Circles and arcs can be converted to simple polygons allowing vertex editing. The smoothness of the converted circle or arc is determined globally by the setting Arc/Circle Resolution (degrees) in Options > Preferences > Entry/Edit. You can use different settings for individual shapes using Edit > Modify > Arc or Edit > Modify > Circle.

To convert a selected circle to a polygon:
Choose Edit > Modify > Convert To Polygon.

To edit the characteristics of a selected circle:

1. Choose Edit > Modify > Circle.
2. Select the desired mode for changing the radius:
   • Absolute Radius - Select this option to scale a circle by an absolute amount. For example, if your circle has a radius of .75 inches and you specify a Radius of 1, the circle is scaled such that the radius is 1 inch.
   • Delta Radius - Select this option to scale a circle by a relative amount. For example, if your circle has a radius of .75 inches and you specify a Radius of 1, the circle is scaled such that the radius is 1.75 inches.
3. Specify the Radius, the amount by which you want the circle scaled.
4. Specify a new number for resolution, if desired (See the illustration at the beginning of this section.)

   Note This changes the resolution for the selected circle only, independent of the global setting made through the Preferences dialog box, Options > Preferences > Entry/Edit.

5. Specify a different layer for the circle, if desired.
6. Click Apply (or OK if you are done editing circles).

To edit the characteristics of a selected arc:

1. Specify a new number for resolution, if desired (See the illustration at the beginning of this section.)

   Note This changes the resolution for the selected arc only, independent of the global setting made through the Preferences dialog box, Options > Preferences > Entry/Edit.

2. Specify a different layer for the arc, if desired.
3. Click Apply (or OK if you are done editing arcs).

Editing Polygons and Polylines

Several commands found on the Edit > Modify menu can assist you in editing polygons and polylines.

• The Join command allows selected polylines with coincident endpoints to be joined into a single polyline. If a closed shape results, the joined polylines are converted to a polygon.
• The Break command converts a selected polygon into a single polyline.
• The Explode command converts selected polygons or polylines into two-point polylines.

To join multiple polylines into a single polyline:

1. Select the individual polylines you want to join.
2. Choose Edit > Modify > Join. All coincident endpoints are joined. You can verify what has been joined by clicking on the shape to select it and observing whether or not the entire shape is selected.

To convert a polygon into a single polyline:

1. Select the polygon.
2. Choose Edit > Modify > Break. The starting and ending points of the polygon are broken, identified by a marker, and you can now manipulate the shape as a polyline.
   

To convert a polygon or polyline to individual, two-point line segments:

1. Select the polygon or polyline.
2. Choose Edit > Modify > Explode. All vertices are disconnected leaving you with individual line segments that you can edit as needed.
   

Adding a New Vertex

To add a new vertex to a polygon or polyline:

1. Choose Edit > Vertex > Add.
2. Click a point between two existing vertices, and move the pointer. A flexible line is drawn between the vertices and the pointer.
3. Click again to specify the new vertex and the shape is redrawn.
   

Moving a Vertex

To move a vertex on a polygon or polyline to change its shape:

1. Click to select the vertex and drag the pointer in the desired direction. A flexible line is drawn from the affected vertex to the pointer.
2. Click again to specify the new location of the vertex and the shape is redrawn.

Deleting a Vertex

To delete a vertex on a shape you have drawn, be sure the Vertices filter is turned on (Options > Preferences > Select) and draw a selection window enclosing all vertices you want to delete. Click the Delete button on the toolbar and the shape is redrawn without those vertices.

Clicking anywhere on an arc deletes the arc and connects the former endpoints of the arc with a straight line.

Converting a Vertex to an Arc

You can convert any vertex to an arc and specify the desired radius of the arc, with respect to the units of the window.

To convert a vertex to an arc:

1. Choose Edit > Vertex > To Arc. You are prompted enter location of the vertex and a dialog box appears.
2. Change the radius as desired and click Apply.
3. Click any vertex you want to convert to an arc. The vertex is redrawn accordingly.
   You can continue converting vertices in this manner using a different radius each time if desired, but you must click Apply each time you change the radius. When you are through making these changes, click OK to dismiss the dialog box.
   

Converting a Vertex to a Mitered Edge

You can convert any vertex to a mitered edge and specify the desired length of the mitered edge, with respect to the units of the window.

To convert a vertex to a mitered edge:

1. Choose Edit > Vertex > Miter. You are prompted enter location of the vertex and a dialog box appears.
2. Change the miter length as desired and click Apply.
3. Click any vertex you want to convert to a mitered edge. The vertex is redrawn accordingly.

You can continue converting vertices in this manner using a different miter length each time if desired, but you must click Apply each time you change the length. When you are through making these changes, click OK to dismiss the dialog box.

Stretching a Wire or an Edge of a Shape

The Move > Move Edge command enables you to change the shape of an existing wire, or to redefine a shape by stretching an edge (a segment between two vertices).

To stretch an edge:

1. Choose Edit > Move > Move Edge. You are prompted to enter the location of the line.
2. Click the edge you want to stretch. As you move the pointer, a ghost image moves with it and showing how the shape will be redrawn.
3. Click again to define the new shape.
   

Scaling an Object Using a Scaling Factor

To scale an object using a scaling factor:

1. Choose Edit > Scale/Oversize > Scale and the Scale dialog box appears.
2. Enter scaling factors for both X and Y.
   Scaling factors must be positive. Scaling factors greater than 1.0 increase the size of objects, while factors less than 1.0 decrease the size of objects. To scale the objects uniformly, enter the same scaling factor for both X and Y.
3. Click OK and you are prompted to enter a reference point on the object around which to scale.
4. Click to specify the reference point and the object is scaled.

Scaling an Object Relative to the Design Window Units

There are two commands, Oversize and Copy & Oversize, that enable you to scale an object with respect to the design units, for example, inches or mils. The Oversize command replaces the original image with a scaled image. The Copy & Oversize command adds a scaled copy of the selected object (using the size you specify) to the design while preserving the original object. Objects that can be oversized are polygons, paths, circles, rectangles, and arcs. All other objects are ignored.

To scale the object itself, in Schem or Layout units:

1. Select the object.
2. Choose Edit > Scale/Oversize > Oversize and a dialog box appears.
   
   This field enables you to specify an amount by which the selected object should be scaled (in all directions). A positive number increases the size of the object by that amount; a negative number decreases the size of the object by that amount. If a negative number is used that results in an object whose area is less than or equal to zero, then the object will be deleted.
   
   This field enables you to specify a cutoff angle for mitering corners (mitering only occurs when the oversize distance value is a positive number). Any angle of a polygon smaller than the specified cutoff angle is mitered. The default cutoff angle is 0 degrees. The valid range for this field is [0, 90].
3. Make any necessary changes in the dialog box, and click OK.
   

To make a scaled copy of an object, in Schem or Layout units:

1. Select the object.
2. Choose Edit > Scale/Oversize > Copy & Oversize and a dialog box appears.
3. Specify the desired angle and click OK.

Editing Existing Text and Text Attributes

There are two methods of editing text you have added to your design: you can use the on-screen editor or edit through a dialog box.

Note To edit text attributes, you must use the dialog box method.

To edit text using the on-screen method:

1. Position the pointer over the text you want to edit and click. Notice the following changes:
   • The text takes on the color currently defined for Highlight in the Preferences dialog box (Options > Preferences > Display).
   • The status panel prompt changes to read, On-screen Text Editor: in progress
   • A vertical bar (|) representing a text insertion cursor appears in the line of text.
2. Use the arrow keys or the mouse to reposition the cursor, as needed, near the text you want to change. Use the backspace key, as necessary, to make your changes.
3. When you are through, move the pointer away from the text and click once to end the text editing command.

To edit text using the dialog box method:

1. Choose Edit > Edit Text. The dialog box appears and you are prompted to enter the location of the text.
2. Click to select the text you want to edit. The selected text appears in the dialog box for editing (If you type multiple lines as a block of text, that block appears.)
3. Make any desired changes to the text.
4. Make any desired changes to the text attributes.
   • Font Type - Schematic only - All True Type fonts installed on your system are available. Select the desired font from the drop-down list.

     Note On UNIX, if you want to add additional True Type fonts that were not supplied with ADS, copy them to $HPEESOF_DIR/lib/fonts.

   • Point - Represents the size of text in traditional units used in printing.
   • Layer - Enables you to select a different layer for the text.
   • Placement Angle - Enables you to rotate existing text by specifying an angle in degrees. Positive values rotate the text counterclockwise; negative values rotate it clockwise.
   • Non-rotating (when in hierarchy) - Select this option to prevent text on a symbol or design from being rotated when the symbol is rotated.
   • Justification, Horizontal - This setting represents two types of justification: one is how individual lines of text in a block of text are aligned with one another; the second is how an individual line of text or block of text is positioned horizontally, relative to the reference point you specified to begin typing the text.
   • Justification, Vertical - This setting aligns a string or block of text vertically, relative to the reference point you specified to begin typing the text.
5. Click Apply. Changes to the selected text are reflected immediately in the drawing area.
   You can continue to select text and make changes, but you must click Apply for each set of changes for those changes to take effect.
6. When you are through making changes to text, click OK to dismiss the dialog box.

Editing Wire/Pin Label Attributes

To change the color, size, and font of existing wire labels, choose one of the following methods:

• Use Edit > Wire/Pin Label > Wire/Pin Label Attributes
• Double-click the wire label to display the dialog box
• Right-click and select Wire/Pin Label Attributes from the pop-up menu

Forcing Objects Back onto the Grid

If an object is offset from the current grid spacing, you can force it back to the nearest grid point with the Modify > Force to Grid command. If the selected object is an item with pins, pin 1 is forced to the nearest grid point.

To force an object back onto the grid:

1. Select the object.
2. Choose Edit > Modify > Force to Grid. The selected object snaps to the grid.