Every fingering that fits a hand
x53530
hard · no 5
x53550
hard · no 5
acaaac
moderate · barre
x53560
hard · no 5
x5355x
hard · no 5
What is true of it
Dm9 is D, F, A, C and E — 1, b3, 5, b7 and 9 counted from D.
On an instrument that cannot reach all 5, the 5 and 1 go first, in that order.
The easiest of the 5 fingerings below is x53530: 4 fingers, held at the 3rd fret.
None of them uses an open string, so this chord moves up the neck unchanged — the same shape 1 fret higher is the chord a semitone above.
1 of the 5 need a barre.
It leaves out the 5. 6 strings cannot carry 5 notes, and the 5 is the one this chord can lose without changing what it is.
1 string stays silent.
Where its notes are on the neck
The brass dots are D, the root. Everything else is a chord tone with its degree printed in it.
With a different note underneath
Dm9/F
100210
Dm9/A
503530
Dm9/C
x33230
An inversion is the same chord with a different note lowest. The name changes to a slash name because the bass is what a listener hears as the foundation.