SELECTIONPREVIEWLIMIT (System Variable)

Limits the number of objects that can display preview highlighting during a window or crossing selection.

Type: Integer
Saved in: Registry
Initial value: 20000

When you select a large number of objects using a windowing or crossing method, preview highlighting can sometimes affect program performance. You might want to decrease this number when working with large, complex drawings. Whenever the selection set exceeds the number in this setting, all preview highlighting is discontinued.

This setting has no effect unless SELECTIONPREVIEW is on.