Show Page Settings in the Inspector
would it be possible to transfer the page settings into the inspector?
The first possibility would maybe be if simply nothing is selected.
A second possibility might be to make pages selectable in Scoreview, so that the page settings appear in the Inspector as soon as I just select the page (I don't know if this is technically possible)
It might look that way.
If you select pages in the preview (or perhaps directly in Scoreview if possible), the settings might change so that the margins are only applied to the selected pages. The other settings might even be grayed out.