Controls whether object snaps are automatically projected onto a plane parallel to the XY plane of the current UCS at the current elevation.
| Type: | Integer | 
| Saved in: | Not-saved | 
| Initial value: | 0 | 
|  
			  Value  | 
 
			  Description  | 
|---|---|
|  
			  0  | 
 
			  Osnap uses the Z-value of the specified point  | 
|  
			  1  | 
 
			  Osnap substitutes the Z-value of the specified point with the elevation (ELEV) set for the current UCS  |