I have a 7-strings Classical Brazilian Guitar.
I wrote a piece for 6 strings guitar - few of the notes are in Red color because I wrote out of range (lower bass).
Then I’ve Edited the guitar on Setup mode - added 7st string with “Open Pitch=B2” 22 frets.
Then all the Red notes (that are out of the guitar range) are not positioned on the 7th string - are displayed with “?” mark instead of fret position
Only workaround is to change instrument to electric 7 strings guitar.
see picture attached