Dorico 4 drum bar repeats - how to edit?

I’m sure I’m missing something obvious - but is there a way to edit bar repeats in drum set? I’ve added some repeats, but I would like to be able to change a couple of beats. I don’t know how to ‘open’ the repeated bars to change them. Thanks!

One can use U (in write mode) to split a repeat-measure area. If one does it twice, a measure apart, one should then be able to remove the one measure repeat area.

(Of course the subsequent measure repeats will presumably repeat the changed measure rather than the original one.)

That’s really helpful - thanks Derrek! I’m just getting to grips with Dorico…