CAD:Limits
From WireCAD Online Help
Description
While designing in paper user has a specific space to make the drawing , with CAD you can have unlimited space to design the drawing. The drawing limits are two-dimensional points in the world coordinate system that represent the lower-left and upper-right boundaries. You cannot impose limits on the Z direction.
Remarks
When limits checking is turned on , the drawing limits restrict the coordinates you can enter to within the rectangular area. Drawing limits also determine the area of the drawing that can display grid dots, the area displayed by one of the scale options of
zoom, and the minimum area displayed by zoom all.