I am collaborating on a project with a person using AutoCAD (in 2D).

I import the AutoCAD file into ViaCAD with no problem. I then create three NEW layers of my own original work.

When my associate sends me an updated version of his work I convert that to ViaCAD also. Here is where I am having difficulty. I want to copy ONLY the three layers that I have created using my "master" (that has ALL the layers) file and transfer them to my associates new document (that has only SOME layers) thereby creating a new "master" file (with ALL the layers).

In other words, my associate is working on layers 1-7, I am working on layers 8-10. (I have ALL 10 layers in my file, but I only work on layers 8-10). When he sends me his new version of layers 1-7, I want to merge that file with my latest version of just layers 8-10. Creating a new document with all layers 1-10.

This procedure will repeat, he will again send me layers 1-7, and I will want to merge ONLY layers 8-10 of my 10 layer drawing to the new file.

My associate will never have more than layers 1-7. I will be the only one with all 10 layers. But as he periodically updates layers 1-7 I want to merge that new document with layers 8-10 from my 10 layer drawing.

In the old paper days, I would just put my tracing on top of his new ink drawing, make a copy and be done.