i do not understand, why, as shown in the video, I cannot activate “Start voice” manually, even though this is the feature that gets activated, when I remove rests via “Edit => Remove rests”. Also, when deactivating the “Start voice” option again, the rests will not return… I am confused…
And how can I remove a voice in a situation like the one shown in the screenshot, where the r.h. of the piano has 2 fermatas on one rest?
That would be because you cannot start a voice that has not been stopped before. When you “remove rests”, that “ends voice” property gets toggled on the last note before the rests in that voice (you can check it!)