You can however (as of MuseScore 3) use Ctrl + Del (Mac: Cmd + Del ) to delete a beat (note/chord or rest) from a measure, creating an irregular measure. See also Remove selected range.
How do you remove rests?
Procedure
- In Write mode, select the rests you want to delete. Tip. You can select rests individually, or make a larger selection that contains the rests you want to delete.
- Choose Edit > Remove Rests.
How do you change rests in MuseScore?
How to enter a rest
- Ensure that you are in note input mode by either (1) pressing N or (2) clicking the "N" icon on the left of the note input toolbar (both methods toggle between on and off). ...
- Click on a note duration in the toolbar equal to the duration of the desired rest. ...
- Press "0" on your keyboard.