Inputting octave lines with the popover
You can input octave lines using the clefs and octave lines popover, both during step input and by adding them to existing music.
Procedure
Result
During step input, octave lines are input from the caret position. When you stop octave lines, they end at the caret position.
When you add octave lines to existing notes, they are added either above or below your selection, depending on whether the octave line indicates that notes are played higher or lower than notated.
Tip
You can also lengthen/shorten octave lines after they have been input.