Dynamics should be only added to one note of a chord
1. Make a score with many staves,
2. Put notes in every staff on measure x, some chords, some single notes
3. Rather than apply the same dynamic one at time to reach staff at the start of measure x, click to select the first note of every staff in measure x and click on a dynamic marking to apply
4. Now you have to delete the duplicate dynamics on the staves with chords because they look wierd. This should not be necessary.
Workaround: use ctrl click to individually select notes before applying, but this is slower.