Fixing vertical positions of staves?

Hi, is there a way to fix the vertical positions of staves, after having made manual adjustments to systems and staves?

I’m having a problem where after changing the fonts in tempi, that is making all of the staves jump, losing all the adjustments that I’ve made.

Your vertical adjustments will be retained provided the casting-off (i.e. which bars are on which systems) doesn’t change. Try locking the frames in your layout before you make your font change, and hopefully that will help prevent the casting-off from changing.

Many Thanks Daniel !!