The chord Dm/G# that is shown here contains the notes: G#, D, F, A. The root of the chord is D (The lowest sound - the bass - is G#). The scale from which the chord is derived is Minor triad (1–♭3–5), and the degrees of the scale are: 1, ♭3, 5.
To play the chord Dm/G# shown above, place your fingers as follows:
On string number 4, on fret number 6
On string number 3, on fret number 7
On string number 2, on fret number 6
On string number 1 (the thinnest), on fret number 5
Start strumming from string number 4 (notice not to play strings 5 and 6).