Merge shared layers

Hi, I’m relatively new to Omnigraffle Pro. Is there a way to merge shared layers into one shared layer? I’m interested in compressing WIP shared layers into a ‘final’ shared layer for ease of use across a 30+ screen wireframe design.

A follow up, is there a way to merge shared layers and save them to a regular layer? Or simply copy multiple shared layers into one new regular layer?

I’m anticipating that there is a more efficient work flow I could follow, and welcome suggestion! I’m an old-school photoshop’r at heart and have too much muscle memory from my old work flow.