A number of useful commands can be found in the Edit → Tools submenu.
This tool adds or removes line breaks over all or part of the score:
Chose Edit→Tools→Add/Remove Line Breaks…. The following dialog appears.
Chose one of the following options:
The explode command allows you to select a passage of music in a single staff and split (explode) the chords into their constituent notes. The top note of each chord is retained on this "source staff" while lower notes are moved to subsequent staves. Explode only affects notes in voice 1.
To explode a section of the score:
Notes: (1) MuseScore will discard the lowest note(s) of any chord that contains more notes than the number of staves in the selection. (2) If a given chord has fewer notes than the number of destination staves, then notes will be duplicated as needed so that every staff receives a note. (3) Any existing music in the destination staves is overwritten. (4) If you select a partial measure, the explode command will automatically expand it to a full measure.
The Implode command works in the opposite way to "explode":
Note: Implode works best if the rhythms of selected underlying staves are similar to that of the top staff—the latter providing the rhythmic template for the operation.
The voice 1 notes of underlying staves are copied to the top staff in the selection.
All selected notes in the staff are now displayed in voice 1.
This command fills the selection with slashes, one per beat. For normal (empty) measures, the slashes are added in voice 1.
If there are already notes in a measure in the selection, the command will put the slashes into the first empty voice it finds. If a measure contains notes in all 4 voices, voice 1 will be filled with slashes, over-writing any existing notes. In voices 1 and 2 the slashes will be centered on the middle line of the staff, in voices 3 and 4 they appear small and above or below the staff. All slashes are set to not transpose or playback.
This command toggles selected notes between normal notes and rhythmic slash notation: notes with slash heads, set to not transpose or playback. For notes in voices one or two, the notes are fixed to the middle staff line.
For notes in voices three or four, the notes are fixed above or below the staff and are also marked small (also known as "accent" notation). You may find it helpful to use the selection filter to exclude voices one and two from your selection before running this command, so only the notes in voices three and four are affected.
In percussion staves, the notes in voices 3 and 4 are not converted to small slashes but to small notes above or below the staff.
Rehearsal marks added via the text palette will automatically be labeled with the next letter or number (based on whatever you typed into the first rehearsal mark), but with the menu command Edit→Tools→Resequence Rehearsal Marks, you can change all marks at once from letters to numbers (e.g.) or correct marks that have become out of order through use of copy and paste. Select the range of measures you want to apply the command to before running it.
MuseScore automatically detects the sequence based on the first rehearsal mark in the selection—all rehearsal marks in the selection are then altered accordingly.
The sequence can be:
This command, available in MuseScore 2.0.3 and above, copies all the lyrics of a score, so you can paste them into another document.