Thanks, Marc. But again, not working. What you describe works when dragging down, but not when dragging up. When I drag up, no matter what key combination I try or where in the staff I drag, the only staff that moves is the one I’m dragging.
Could it be that it works on PC’s but not on Mac? When you say “alt-opt”, as a Mac guy I’m interpreting that to mean the Option key, although I’ve tried every combination of Shift/Ctrl/Opt/Command I can think of, and none of them works.
[Edit] OK, I’ve stumbled one thing that at least moves staves upward together; option/drag the lowest of the staves you want to move, and the ones above all move upward, maintaining their distances as long as the highest staff you’re dragging hasn’t reached the top of the page, in which case, the distances between them begin condensing proportionally. (I was, perhaps ignorantly, dragging the uppermost of the staves I wanted to move.)
I also discovered that the same is true in reverse; when option/dragging downward from the uppermost staff, they maintain their exact distances apart until/unless the lowest staff being dragged is at the bottom of the page, at which point the distances between them begin condensing.
Having said all that, the original problem stands: if Dorico has created a large space between two staves, there is no way to drag them in such a way that the gap is closed, and the staves below it are moved proportionally farther apart. Proportionally closer together is doable in either direction, up or down. But proportionally farther apart, apparently not.
And I promise that unless someone comes up with a different thought, I’ll let this thread die a natural death now.