Mode
A Mixolydian
The A Mixolydian mode — A B C# D E F# G — shown across the guitar neck.
Swipe the neck sideways to see the higher frets.
A Mixolydian is the major scale with one note changed — the b7, G. That single note is what the mode sounds like; lean on it and the colour is obvious, avoid it and you are just playing major.
Notes
A B C# D E F# G
Intervals
1 2 3 4 5 6 b7
Parent scale
D Major
Degree of parent
5
The tool shows this from its parent key, D major, with A marked as where Mixolydian begins, the same seven notes centered on D.