I probably know already the answer but maybe I am wrong.
I want to copy and paste or cut and paste part of drawing while preserving groups.
I have 2 vector drawings in one file which objects share groups. I can select one of drawing, let's say right drawing with group selection tool and Illustrator only selects objects of this particular drawing (otherwise it just select both drawings).
But after copy/paste or cut/paste into the same or different file it destroys groups structure and all objects of drawing are placed as ungrouped bunch of objects.
The only workaround I have found till now is to create copy of file, then in second file remove left drawing and copy right drawing into the first file (where right drawing were already removed). This operation gives me copy of groups - the outcome I wanted from the start.
Is it the only solution or maybe AI is a little smarter in that field?