Transcribing from recording
From time to time someone records themselves singing something and wants our pianist (who doesn't play by ear) to be able to play it for them. I know their timing may not be perfect because they held out some notes, slowed down a phrase or whatever. I would like to be able in turn off (temporarily) beat counting in Musescore and freely change duration of notes/rests, and freely move notes/rests/bar lines as I seek to work out a correct timing. (Perhaps while beat counting is turned off use color or plus/minus marks to indicate measures with more or less than the correct beat count.) Then when I turn beat counting back on have Musescore work from beginning to end to correct the beat count in each measure by flowing notes/rests across bar lines as needed. I would want to be able to add a line of lyrics after all notes are entered as an aid to keeping up with where I am while adjusting note durations. As far as I know, there is no practical way of doing this now.