More precisely, the issue with removed forced stems is also reflected in Write and Engrave modes.
Conversely, beaming changes in one layout do not show up in other layouts.
Can anyone explain the reasoning behind this difference in behaviour?
Layout1 with forced stems and changed beaming:
Layout2 with forced stems removed and changed beaming retained:
Boye, changes you make to stem direction affect only the layout in which you make those edits. Almost all properties are independent in each layout, so that you can obtain exactly the graphical result you want in each layout.
I use the stem directions to show how the notes in piano scores are distributed between the two hands. In this particular case, I want two layouts that differ only with respect to margin size: one layout for print, another for iPad. Is it somehow possible to achieve this without having to enforce all the stem directions in each separate version?