Constrains cursor movement to the perpendicular.
| Type: | Integer | 
| Saved in: | Drawing | 
| Initial value: | 0 | 
When ORTHOMODE is turned on, the cursor can move only horizontally or vertically relative to the UCS and the current grid rotation angle
|  
			  Value  | 
 
			  Description  | 
|---|---|
|  
			  0  | 
 
			  Turns off Ortho mode  | 
|  
			  1  | 
 
			  Turns on Ortho mode  |