1. Click
![](../layout/images/zoom_port16x16.png)
on the Graphics toolbar or click
View >
Zoom Port. The
Zoom Port window opens in the lower-right corner of the graphics window. The portion of the layout that appears in the graphics window is displayed in the Zoom Port in a red box.
2. Click
![](../layout/images/plus_10x10.png)
or
![](../layout/images/minus_10x10.png)
in the Zoom Port to zoom in or out of the layout. The red box adjusts to show the boundary of the current view of the layout.