To exit interference detection, click End Interference Analysis 
. Mass elements created during the session, as well as tags attached to them will be removed. However, opening symbols that were inserted will remain.
You can save the interferences created in a drawing. On the Interference Detection palette, under Settings, for Keep interference mass elements when ending analysis mode, select Yes.
If you want to keep only specific interferences when ending interference detection, prior to exiting, remove the ones you do not want to keep. See Navigating and Resolving Interferences for information about how to remove interferences.
Note: When you exit interference detection, the interference analysis is ended for the current drawing only. If you have analyzed multiple drawings, you must exit interference detection for each drawing.
Note: To have collisions appear in red while drawing, turn on collision detection. On the command line, enter COLLISIONDETECTION. Be sure to turn off collision detection when no longer needed in order to preserve system resources.