Bar numbers on instrumental groups?

Is it possible to add bar numbers at the top of each instrumental group, as with System Text? I can’t see anything in Layout Options > Bar Numbers.

And weirdly, when I select a bar number in the score, the Properties pane shows options for the Time Signature.

It is not possible at the moment, but we do intend to make it possible to make bar numbers appear in more than one place down a system in future.

Bar number changes are part of time signatures (as are special barlines) but we do our best to hide this link in the user interface. The Properties panel gives the game away a bit, though.