[rcharif]

Greg, thanks for your reply. I tried right-clicking as you suggest. This brings up a context menu, but I don't see anything there about moving the group up or down, which is what I want to do.

Since my original post, I discovered that I can do what I want-- in a clumsy way-- via the menus: Edit -> Outlining -> Move -> Move Up. According to that sub-sub-sub-menu, the command-shift-[up | down]arrow should do the same thing, but on my installation, those keyboard shortcuts do nothing.