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In publish geometry command, there is a selection box under "References" and it says "define datum references" in its quick tip.
I just realised I could include its copy geometry feature here to include all the quilts I copy geomed from other parts. I used to pick one by one and place them under "surface set" selection box. I just need to include them by a single click!
The question is : what can I select under "references" box and how this actually works for CG features. Thanks