LAS\SET WINDOW [wl1 wu1 [wl2 wu2 [...]]]
Defines one or several line windows to be avoided by BASE when fitting a
baseline. The cursor will be used to specify missing arguments if SET
CURSOR is ON, unless option /NOCURSOR is present. When using the cursor,
enter: N to enter a value, C to cancel the last entry, H for help, E for
exit. The boundaries are in current unit. There is no default.