Music runs off the page

Music running off the page over the right margin or appearing unduly compressed is almost always due to entering an incorrect duration on a note, causing the final note in a measure to extend over the bar line. It is not invalid if the final note in a measure does not end on the automatically entered bar line, as the note is simply assumed to carry over into the next measure. But if a long sequence of such carry-over measures occurs the music can appear compressed or may flow off the page because automatic line breaks can be inserted only at the end of complete measures, i.e., where all notes end before or at the end of the measure.

Note: An incorrect duration can cause line breaks to be inhibited, leading to a line of highly compressed music or music which flows off the page.

The incorrect duration can be found easily if bar checks are used, see Bar and bar number checks.

If you actually intend to have a series of such carry-over measures you will need to insert an invisible bar line where you want the line to break. For details, see Bar lines.

LilyPond — Usage v2.25.8 (development-branch).