Multirest selection in Engrave mode

I frequently want to organise scores so that page turns are convenient - ideally with a multirest at the end of the page to be turned. In the “Before” image I want to select the first two music frames and make them into a single frame. However I cannot select the 5 bar multirest - I have to go the first note of the next bar and than I can produce the “Next” image, I then have to fiddle with frame breaks to get the “After” image. This is tedious - what am I missing?
After.png
Next.png
Before.png

You’re not missing anything, I’m afraid: you can’t select multi-bar rests because they’re not really there. However, you should be able to select the barline immediately following the end of the multi-bar rest and use that to determine the position of the frame break.