https://forum.igigbook.com/viewtopic.php?p=9742&sid=800798b650a2308b1229b6063bbfd28f
Transpose Chords & Melody? Check Out The New Book Transposition Feature. - i Gig Book
iGigBook App: Manage all of your sheet music resources; real books, fake books, chord charts that transpose, single sheets of music and full blown scores. All...
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https://support.apple.com/en-sa/guide/logicpro/lgcp10b4d637/mac
Transpose chords in Logic Pro for Mac - Apple Support (SA)
You can transpose selected chords up or down by semitones using menu commands or keyboard shortcuts.
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