Every fingering that fits a hand
6404
easy · no 5
x104
easy · no 5
640x
easy · no 5
6407
easy · no 5
6444
moderate
What is true of it
D♭m is D♭, F♭ and A♭ — 1, b3 and 5 counted from D♭.
On an instrument that cannot reach all 3, the 5 goes first, in that order.
The easiest of the 5 fingerings below is 6404: 3 fingers, held at the 4th 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.
It leaves out the 5. 4 strings cannot carry 3 notes, and the 5 is the one this chord can lose without changing what it is.
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
D♭m/F♭
x404
D♭m/A♭
110x
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.