Electric VLSI Design System User's Manual

Chapter 2: Basic Editing

2-5-1: Node Sizing

To change the size of a node, select it and use the Interactively command (in menu Edit / Size). After you do that, your mouse movements will stretch an outline around the node. The outline is anchored at the corner farthest from the cursor, and stretches the corner closest to the cursor. The anchored corner changes as you roam the cursor over the node, but it stops changing when you click (and keep dragging). When you release the button, the node changes size.

While stretching the node, hold the Control key to constrain the size to just one axis, and hold the Shift key to constrain the X and Y sizes so that they scale uniformly. If you hold the Control and Shift keys, then the node will resize about its center.

It is recommended that you hold the mouse button down while dragging so you can see the final size of the node. Release the mouse button to actually resize the node. To abort this operation, type Escape.

Figure 2.10 To change the size of more than one node at a time, select the nodes and use the All Selected Nodes... command (in menu Edit / Size). The dialog allows you to set the X and Y sizes of the selected nodes. If you leave one of these size fields empty, that coordinate is not changed.

Note that when typing size amounts into a dialog, specify the size of the highlighted area. In a typical MOS transistor, the highlighted area (where active and polysilicon cross) is 2x3, even though the component is much larger if you include the four overlap regions sticking out.

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