I tried changing the Global for 2D instruction to our company name so I can modify this moving forward. When I select the subassembly in the spread sheets it says its not found. I think I need to copy it and match the names but not sure how to do that. 

I copied and renamed subassembly in workbook explorer but nothing. Trying to do it in library designer but the copy subassembly button is greyed out. What am I doing wrong?