investigating this leads me to some comments on the user interface. I will start a new thread for that.
One specific comment on the user interface that I think belongs on THIS thread is that the icon for the Union tool appears in both the draw mode and the detail mode. It makes sense to me that this icon should apply to the “combine group” tool in in the operations tool tab draw mode and also to the union tool which in my opinion should be moved to the operations tool tab in detail mode.
The more general discussion about which tools appear in which mode and how the UI makes it apparent to the user which are available belongs in the new thread which can be found HERE: User interface review update