Controls the type of preview when you hover over a drawing file tab.
| Type: | Integer | 
| Saved in: | Registry | 
| Initial value: | 1 | 
|  
			  Value  | 
 
			  Description  | 
|---|---|
|  
			  0  | 
 
			  Displays a list that includes Model and all layout names.  | 
|  
			  1  | 
 
			  Displays a set of thumbnail images.  |