D Mixolydian mode
D E F♯ G A B C
Formula: 1 2 3 4 5 6 ♭7
A major scale with a minor 7th: the scale of the dominant 7th chord, the V of the key a 5th below.
It has the same notes as G major, starting from D.
On the neck, frets 0 to 12
The 1st string (high e) is at the top, as in the app. The root is filled.
Open it in the app: 3. Scales & Modes, in D
The Mixolydian mode in other keys