UPDATETHUMBNAIL System Variable

GstarCAD 2026 → System Variables → U

Function Description:

The UPDATETHUMBNAIL system variable is used to control the update of thumbnail preview for views and layouts.


Type	Bitcode
Saved in	Drawing
Initial value	15
Range	0 ~ 16

System Variable Value:

0: do not update preview
1: update preview of views in model space
2: update preview of views in layout
4: update preview of layout
8: update preview when created, modified, or restored layout or views
**16:**update preview when saving a drawing