Get rid of duplicate lines with ZWCAD+ overkill

Duplicate or overlapping lines and arcs are redundant, sometime it may be danger, let's see how to use OVERKILL to remove them in ZWCAD+.  Here is a video tips on CAD forum: 

http://www.zwsoft.com/forum/thread-2744-1-1.html

You may like more threads about “overkill” on CAD forum:

Where is OVERKILL? How to delete duplicate and overlapping lines?