Write the chord in closed position with the correct note in the bass. The key signature applies, so a note with no sign follows it. The accidental picker starts on “No sign” for every note; pick a flat, natural or sharp only when a note needs one (like the raised leading tone in minor). Click a note again to remove it. You can also type the chord from the bass up: letter names with a space between notes (they follow the key signature), and b, #, x or n right after a letter when it needs an accidental, then Enter. After a flat, press Space before the next note. If the key signature already flats a note, don't add a flat: a b typed right after it is the note B. Backspace erases the last note.

Piano sound: Salamander Grand Piano by Alexander Holm, used under CC BY 3.0 (trimmed and converted to mono).

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