Rewrite measures from..to (numbers, inclusive) of ONE track of the draft with .cesure measures, as read_score returns them; to = from - 1 inserts before from. Keep the id of each measure you keep, even rewritten: a measure written without its id is a new measure, and the one it stood for is removed with what it carried (a repeat it opened, say). Leave the id out only for a new one; a measure of the range left out is removed, and measures [] removes the whole range. Unlike the format's own advice (a range of ids, every track rewritten), the other tracks follow column by column, as in the editor: a column is inserted, removed or given a time signature on every track; its repeat signs are carried as the editor carries them, and a tempo change stays on its column (on the next one when its column is removed), so no other column changes tempo. A note may be written by its pitch (E4, Bb3) in place of fret.string: Cesure chooses its string and fret, and never moves a note written with its string. The answer names the measures written. Every measure you write must read and fill its time signature, or nothing is written and the refusal names each fault with its place; one handed back as it is (id and content) is not judged. Measure notation (.cesure): each voice is one string of beats separated by spaces. beat = content.duration[{d | tu 3}]; content = fret.string[{note props}] | pitch | (note note …) | r. Durations, on EVERY beat: 1 whole, 2 half, 4 quarter, 8, 16, 32, 64. Strings from 1 (the highest); x as fret mutes. A pitch (C4 = middle C, F#3, Bb2) lets Cesure choose string and fret; a staff is all by pitch or all fret.string. Beat props: d dotted, tu 3 triplet on each beat of the group. Note props: t tie, h hammer/pull-off and sl slide to the next note on that string, v vibrato, b (0 4) a whole-tone bend. EACH VOICE FILLS ITS TIME SIGNATURE EXACTLY: 4/4 = 4 quarters = 8 eighths, 3/4 = 3 quarters, 6/8 = 6 eighths; complete a short one with rests. A measure without numerator/denominator is 4/4, whatever came before. A second voice (a bass under a melody) is a second string in voices. Examples (4/4): "5.3.4 7.3.4 r.2" (fret 5 then 7 on string 3 (strings from 1, the highest), quarters; a half rest); "(0.1 1.2 0.3).2 x.6.4 r.4" (a chord, a half; a muted note); "E4.8 F#4.8 G4.4 Bb3.2" (notes by pitch (C4 = middle C): Cesure chooses string and fret); "5.3.4{d} 5.3.8 2.1.8{tu 3} 3.1.8{tu 3} 5.1.8{tu 3} 7.2{h}.8 8.2.8" (dotted quarter; a triplet of eighths (each beat carries it); a hammer-on to the next note); "5.3.2 5.3{t}.4 7.2{sl}.8 9.2{v}.8" (a tie to the note before, a slide, a vibrato). A measure: {"id":"p2","numerator":3,"denominator":4,"staves":[{"voices":["0.1.8 2.1.8 3.1.4 5.1.4","0.6.2{d}"]}]}. The full format: https://cesure.app/format