2004

358 | Chapter 17 Change Existing Objects
When selecting objects with a window selection, usually the entire object
must be contained in the window selection box. However, if an object with
a noncontinuous (dashed) linetype is only partially visible in the viewport
and all the visible vectors of the linetype can be enclosed within the selection
window, the entire object is selected.
Specify an Irregularly Shaped Selection Area
You can select objects by specifying points to define an irregularly shaped
area. Use window polygon selection to select objects entirely enclosed by the
selection area. Use crossing polygon selection to select objects enclosed or
crossed by the selection area.
Specify a Selection Fence
You can select objects in a complex drawing easily by using a selection fence.
A selection fence looks like a polyline and selects only the objects it passes
through; it does not select objects by enclosing them. The following circuit
board illustration shows a fence selecting several components.
objects selected using crossing selection box
1
objects selected using window selection box
2
1
2
window polygon result