is there a glossary of icons in solidworks? and what does this one mean?

Hi, obviously search has failed.   It's easy to search on a word to look it up, but not so easy for an icon.

So, is there a list of icons with defintions about what they mean in solidworks?

And, what does this particular one mean?  (Sort of hat like you get at graduation in college)

SolidworksGeneral