additional-voices-to-avoid-collisions.ly changing-a-single-notes-size-in-a-chord.ly changing-partcombine-texts.ly clusters.ly combining-two-parts-on-the-same-staff.ly displaying-complex-chords.ly double-glissando.ly forcing-horizontal-shift-of-notes.ly making-an-object-invisible-with-the-transparent-property.ly suppressing-warnings-for-clashing-note-columns.ly