LAYEREVAL system variable
Function Description:
The LAYEREVAL system variable is used to control whether to evaluate the layer list for new layers when added to the drawing or to attached xrefs.
Type : Integer
Saved in : Drawing
Initial value : 0
Range : 0,1,2
System Variable Value:
0 : off
1 : detect when to add new layers of xrefs to the drawing
2 : detect when to add new layers to the drawing and xrefs
Note: if specified the LAYEREVALCTL system variable to be 0, the settings of LAYEREVAL and LAYERNOTIFY will be ignored.