Turns on and off the visibility of layers in external reference files. To turn this variable on or off, type VISRETAIN in the command bar, and then type 1 to turn on visibility of layers in external reference files or 0 to turn it off. You can also choose Tools > IntelliCAD Explorer and from the Elements list, select Layers for the drawing you want to modify. Then choose View > Xref Layer Visibility.
Type: Integer
Saved: In the .DWG file
Range: 0,1
Default: 1