Controls the dimming for all DWG xref objects.
| Type: | Integer | 
| Saved in: | Registry | 
| Initial value: | 70 | 
The valid XDWGFADECTL system variable value is between -90 and 90. When XDWGFADECTL is set to a negative value, the Xref Fading feature is not turned on, but the setting is stored.
| 
 0  | 
 DWG xref objects are not faded.  | 
| 
 >0  | 
 When the value is positive, controls the percent of fading up to 90 percent.  | 
| 
 <0  | 
 When the value is negative, xref objects are not faded, but the value is saved for switching to that value by changing the sign.  |