This is what I spend about 30% of my engraving-tweaking time on, and I’d like to put it out there for comments. Maybe there’s an elegant solution, or if not, it can maybe be looked at for a solution of a future release?
I have a ritenuto/rallentando with a dashed line which extends to the bar-line. At the bar-line, as is often the case after a multi-bar rallentando, is a rehearsal mark. Engraving-wise, the rallentando line pushes the rehearsal mark out of the way (up), and the pushed-out rehearsal mark subsequently pushes the staff spacing up. I then manually correct this in engraving mode, by shortening the rall line, then bringing the rehearsal mark down again, and then bring the staff spacing back to normal. I have to do this for most rallentandi, and for every part. It’s a lot of (repetitive) work. The problem also applies to the tempo marking immediately after the rehearsal mark (again: as is often the case). There’s a few engraving options for rehearsal marks, but I don’t think any of them solves this.
Apart from not using dashed lines at all (a real shame), another fix is to extend the rall bar not to the bar-line, but e.g. to the bar line minus one or two crotches. This sort of works, though it’s mildly fiddly, and not very elegant (e.g affects play-back ,though in a rather subtle way).
Happy for someone to tell me I’m doing it all wrong (I have no pride left…)