I must be missing something simple here, I can’t find how to enter a vertical line. The manual just says that I can use the Lines panel. That’s fine, but what do I actually do? Horizontal lines work OK, select some notes, click the line in the panel, line appears in the music but when you do this with a vertical line the selection disappears, but no line is drawn.
I am now, it still doesn’t work, but while creating a small project to demonstrate the behaviour I remembered that there was something odd about drum parts, where some stuff doesn’t work like other instruments. I can get vertical lines to work fine on other instruments but not on a drum set.
Found out more. I had forgotten that a drum set is actually lots of individual instruments displayed like it’s just one, so the restriction of applying a vertical line to only one instrument applies.