If I make a marquee selection, in order to delete a group of notes and notations, and a time signature is within the selection, it gets deleted too. Is this a bug? I now know to filter for notes before deletion when this situation occurs.
No. Marquee selections select everything that you can see, including system-attached items (system text, tempi, rehearsal marks etc).
If you want to make a staff selection, it’s safer to click the first bar then Shift-click the last bar. This won’t select system-attached items.
Thanks, Leo. I’m not a frequent user of marquee selections, anyway, so I’ll stick with what I’m used to (which is your recommendation).