I would like to be able to save bone icons when exporting nonessential data. The ability to preserve the icons for import data into the editor is helpful when you have a skeleton that uses various bone icons.

Thank you, Erika.

Erika wrote

I would also add bones colors, which are optional but still very useful to have.

In Professional version 4.1.17 , bone colors are already exported as nonessential data. I don't know when bone color export was added but wanted to let you know.