THUMBSAVE (System Variable)

Controls whether thumbnail preview images are saved within the drawing.

Type:	Integer
Saved in:	Registry
Initial value:	1

This system variable replaces RASTERPREVIEW.

Value	Description
0	No preview image is saved in the drawing
1	A preview image is created and saved in the drawing

When turned on, the preview image is updated for use by all thumbnail images whenever the drawing is saved.

Note: If a drawing is saved to the AutoCAD 2010 or earlier format, the image will likely not be as high in quality. The display quality of preview images is controlled by the THUMBSIZE system variable (not available for AutoCAD LT).