Welcome to the forum.

Yes, you can (and should) set the initial key signature on the main chord sheet, and yes, using F5, you can change it at any measure.

I’m not entirely sure how the program’s AI uses this but I do know it makes a major difference in notation. When you enter notation, the key signature determines the enharmonic spelling of a note (for example, is it G# or Ab). Some folks never change the key signature from the default key of C and the program plays a song with any chords. Whether or not it plays it ‘better’ using the right key signature, I really don’t know. I just write it correctly anyway.

Does that help?


BIAB 2026 Win Audiophile. Software: Fender Studio One 8, Swam horns, Acoustica-7, Notion 6, Song Master Pro, Win 11 Home. Hardware: Intel i9, 32 Gb; Presonus Quantom HD8 & Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors.