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To change the tempo in MIDI output without printing anything, make the metronome mark invisible.

Staff.pedalSustainStrings can be used to set the text used for pedal down and up. Note that the only valid strings are those found in the list of pedal glyphs - the values used this snippet constitute an exhaustive list.

By default, only the numerator of the tuplet number is printed over the tuplet bracket, i.e., the numerator of the argument to the \tuplet command.

Alternatively, num:den of the tuplet number may be printed, or the tuplet number may be suppressed altogether.

If you want to modify the width of ledger lines (for example to make them wider) you can do this by overriding the values of LedgerLineSpanner.length-fraction and (optionally) LedgerLineSpanner.minimum-length-fraction.

If you want to temporary modify the width of ledger lines you have to specify \stopStaff \startStaff before overriding the ledger line values.

The measureLength property, together with measurePosition, determines when a bar line is needed. However, when using \scaleDurations, the scaling of durations makes it difficult to change time signatures. In this case, measureLength should be set manually, using the ly:make-moment callback. The second argument must be the same as the second argument of \scaleDurations.

This form of notation is used for Psalm chant, where verses aren't always the same length.

Slides for chords are indicated by default in both Staff and TabStaff.

String numbers are necessary for TabStaff because automatic string calculations are different for chords and for single notes.

The property chordNameExceptions can be used to store a list of special notations for specific chords.

The layout of the major 7 can be tuned with majorSevenSymbol.