EXTRUDEINSIDE system variable
Resolve intersection with parent entity.
Determines how to modify the parent entity when it intersects with the extruded/revolved entity when the Auto option of the EXTRUDE or REVOLVE command is selected. Parent entities are entities that touch the contour from which the extruded/revolved entity is created.
The EXTRUDEINSIDE system variable is one of the four system variables found under the Extrude mode group.
0 to 2
0 - for Workspaces Drafting and Modeling
1 - for Workspaces Mechanical and BIM
0: Do not modify the parent entity.
1: Subtract the created entity from the parent entity.
2: Unite the created entity with the parent entity.