- Click the bounding box of an underlay to select it.
- Click
- At the command prompt, enter s (Select Polyline), p (Polygonal), r (Rectangular), or i (Invert Clip) and then, draw the specified boundary on the underlay.
To draw a boundary by selecting a polyline, draw or overlay a polygonal shape created with a polyline on the underlay. Then, click Create Clipping Boundary and select the polyline to create a boundary.
To draw a polygonal boundary, you are prompted to specify consecutive vertices. To finish drawing a polygon, press Enter or right-click anywhere in the drawing area.