This morning was my first attempt to use Groups.
Several questions arose.

Should the 4 arcs, (or 4 points), be named before creating the group.
Should the group be renamed to "OuterArc". (e.g.)
When the OuterArc is separated, the +box goes dark, and there is no way to delete it, or change it, in the dropdown display of objects.

Sometimes when a group is hi-lighted, the points go yellow, other times corner angles show up. (Inconsistent?)

Once a group is created, unnamed members remain unnamed, and cannot be named.
Two unnamed subentries can appear, and the 3rd one cannot be deleted.

The drop-down display seems to be in strictly alphabetical order by group.

- Brian

Attached is a 3dm file of the first two stages of 3, circular arcs, for an ionic volute, from an online slideshare site.
I've managed to mess up the object/group dropdown box, and cannot clean it up...