Controls whether thumbnail preview images are created and saved with the drawing.
| Type: | Integer | 
| Saved in: | Registry | 
| Initial value: | 1 | 
Obsolete. This system variable has been renamed to THUMBSAVE.
| 
 0  | 
 No preview image is created in the drawing  | 
| 
 1  | 
 A preview image is created and saved in the drawing  |