Mode
F# Dorian
The F# Dorian mode (also written Gb) — F# G# A B C# D# E — shown across the guitar neck.
Also written Gb Dorian. Gb and F# are the same pitch, though spelling it from Gb would need double accidentals (Gb Ab Bbb Cb Db Eb Fb), which is why F# is the name in use.
Swipe the neck sideways to see the higher frets.
F# Dorian is the natural minor with one note changed — the 6, D#. That single note is what the mode sounds like; lean on it and the colour is obvious, avoid it and you are just playing minor.
Notes
F# G# A B C# D# E
Intervals
1 2 b3 4 5 6 b7
Parent scale
E Major
Degree of parent
2
The tool shows this from its parent key, E major, with F# marked as where Dorian begins, the same seven notes centered on E.