When the time signature is compound time (e.g. 12/8, etc.) MuseScore doesn't treat the main beat as a dotted crotchets but as crotchets - i.e it handles 12/8 as though 6/4. Therefore if one enters a crotchet as the first beat in a 12/8 bar, MuseScore then places a crotchet rest after it instead of a quaver followed by dotted crotchet rest, etc. to match the dotted crotchet main beat.
Would it be possible (or is there already an option or trick) to adapt MuseScore to accommodate compound time directly as suggested? Or have I missed something??