PERSPECTIVE (System Variable)

Specifies whether the current viewport displays a perspective view.

Type:	Integer
Saved in:	Drawing
Initial value:	Varies

In AutoCAD LT, you can only turn off perspective in a drawing created with an AutoCAD-based application; you cannot turn perspective back on.

Note: PERSPECTIVE is set to 0 when the drawing file or DXF file is saved to a file format earlier than AutoCAD 2007.