On the sheet: click a chord to select it, press Delete to remove it, double-click it to rename it. Double-click an empty part of a bar, press Enter, or just type a letter to add a chord. Tab goes to the next bar. Shift-click a bar (or Shift ←→) to select a run of bars, or click a section's letter to select the whole section; then ⌘C copies, ⌘X cuts, ⌘V pastes over the selected bar(s) (to insert instead, click a bar line first: a blinking line marks the insertion point, and ⌘V inserts there), ⌘D doubles it, ⌥←→ moves it, and Delete removes it. ⌘Z undoes any change (⇧⌘Z redoes). To split a bar, drag the dotted line between two chords, or press [ and ] to shorten or lengthen the selected chord by a beat. Press P, or Passing chord beside the chord's name above, to mark it a passing chord: it turns blue, and switching off Passing chords hides them all, keeping their place so the chart doesn't move. Drag a bar line left to move chords into the next bar, or right to pull them back. Click + note in a bar's corner to write a note about the bar; Note beside the chord's name above writes a note about that chord, and the chord is underlined in the note's colour. Click a note to change it. Switch off Notes to hide them; a short line marks a bar with notes, and clicking it opens just that bar. Play a chord on your MIDI keyboard and press Enter to add it. On a selected chord's keyboard, tap to change notes. The × on the keyboard under the wheel empties it so you can click a chord together and press Enter to add it; three quick taps, or shift- or option-click, marks a note blue (the root, or the bass of a slash chord).
As text (Harmony Wheel syntax): | new bar, C * * C7 three beats of C then one of C7, / rest (N.C.), Gm7? a passing chord, (why it works; F#m7) a note on a chord, (borrowed from minor) after a bar's last chord a note on the bar, @SUB changes space, A6{a2* f#3 a3 c#4 e4} an exact voicing.
Markers (the Markers button puts them on the selected bar): ||: and :|| repeat, <x3> three times round, [1] [2] first and second endings, <segno> the sign, <D.S. al Coda> back to the sign, <D.C. al Fine> back to the top, <tocoda> jump to the <coda> after the D.S., <fine> the end. Play and the MIDI file follow the markers.