Virtuoso XL Layout Editor User Guide

Editing Your Layout with Virtuoso XL Layout Editor

To assign colors other than the default colors to the flight lines you specify, follow these steps.

1.In the Incomplete nets list box, select the names of the nets whose color you want to change.

2.In the color choice cyclic field, select the color you want the nets to be.

3.Click Set Color.

The color of the net changes to the color you specified.

To turn off flight lines in the layout window,

From the layout window, choose the Connectivity – Hide Incomplete Nets command.

Note: If editing commands run slowly while the Show Incomplete Nets command is active, use the Incomplete Nets form to turn off the display of incomplete nets on all the nets except the nets you are working on.

Moving Objects Manually in the Virtuoso XL Layout Editor

To move objects (devices, pins, or shapes) in the layout window, follow these steps.

1.From the layout window, choose Edit – Move.

The layout window prompts you to select an object to move.

2.Click on the object you want to move in either the layout or the schematic.

The object is highlighted in both the schematic and layout windows. An outline of the object appears in the layout window and follows the cursor until you click in the layout window to place the object.

Drag lines show connections from pins of the selected object to pins of the nearest instance or the nearest I/O pin.

Virtuoso XL Layout Editor User Guide

Editing Your Layout with Virtuoso XL Layout Editor

The layout window prompts you to click on the new location in the layout where you want to place the selected object.

3.Click on the location where you want to place the object.

The object moves to the new location.

Note: If you select a component in the layout or the schematic before you choose the Move command, Virtuoso XL highlights the corresponding component in the schematic or layout.

4.Click on the next object you want to move or press Escape to cancel the command.

Note: Using the Move command cancels any existing commands in the current or in other windows.

Moving Objects Using Move Options

When you move objects, you can use the Move form to change

■The layer of the object you select

■The angles at which you can move the object

■The presence of drag lines on the object as you move it

■The orientation of the object you select

■The use of placement constraints

■The ability to move members of constrained groups individually or together

To use the Move options form to place components, follow these steps.

1.From the layout window, choose Edit – Move.

2.Press F3.

Virtuoso XL Layout Editor User Guide

Editing Your Layout with Virtuoso XL Layout Editor

The Move form appears. The Display Draglines and Constraint Assisted Control options appear on the Move form only when you are running Virtuoso XL.

3.If you want to change the angle at which you can move an object (any angle, diagonal, orthogonal, horizontal, vertical), choose the angle you want from the Snap Mode cyclic field.

4.If you want to change the layer on which a shape is drawn, turn on Change To Layer and choose a new layer from the cyclic field.

The layer is updated when you move the cursor into the layout window.

5.If you want to turn the drag lines off or on for an object you move, turn

Display Draglines off or on.

Drag lines connect pins on the object to the nearest pins on another object on the net. When you move the object closer to a different object on the same net, the lines reconnect to the new object. These drag lines appear only in Virtuoso XL.

Note: Disabling Display Draglines can speed up the action of the Move command.

Virtuoso XL Layout Editor User Guide

Editing Your Layout with Virtuoso XL Layout Editor

6.To move groups of components bound by placement constraints as a unit or individually, turn on together or individually.

If a group of components you move is affected by placement constraints, those constraints are obeyed during the duration of the Move command.

If a single component you move is subject to an unsatisfied Distance, Fixed, or Grouping (with a fence) constraint, and you move it across a coordinate that satisfies the constraint, the component snaps to that coordinate.

Components restricted by Alignment or Symmetry constraints do not snap to coordinates when you move them, but if their constraints have already been satisfied, you can move them only in ways that do not break the constraints.

In the case of a group constraint with a fence, the Move command lets you move the device until it is inside the fence; after that, you cannot move it outside the fence.

7.Use the Delta X/Y fields to type in the coordinates of the selected devices instead of using your cursor to move devices. In the Delta X and Y text fields type the amount of coordinates to move the devices, and the click Apply XY.

8.To turn off the use of placement constraints for the components you move, turn on ignore.

9.To change the orientation of the object, click on the button describing the orientation you want (Rotate, Sideways, or Upside Down).

The orientation of the object changes when you move your cursor into the layout window.

Note: When you use the Edit – Stretch command with Virtuoso XL running, the

Display Draglines and the Constraint Assisted Control options also appear on the