The standard grips this chord is usually shown with.
DmMaj7b5 is D, F, Ab and C#, a minor major seven flat five. The shape this page opens on is written xx0121, lowest string first.

Also written DmM7b5 or Dm(maj7)b5. The same chord either way; which spelling you meet depends on who wrote the chart.
There are 6 common shapes for DmMaj7b5 on the guitar, and 26 derived voicings in 3 families.
The common shapes, written lowest string first: xx0121, x5x664, x5666x, 10-11-x-10-9-9, 10-11-11-10-x-10, x-x-12-13-14-13.
Shell. Root, third and seventh: the guide tones fix the quality, so the fifth is dropped. That is what leaves a string free, so pick a tension to put on top. DmMaj7b5 has xx0664, x5x664, 10-x-11-10-9-x, 10-8-11-13-x-x.
Drop 2. A close-position chord with the second voice from the top lowered an octave. Sits on four adjacent strings. DmMaj7b5 has xx0121, x5666x, x-x-11-10-9-10, 10-11-11-10-x-x, x-x-12-13-14-13, x4313x, 1401xx, 4536xx.
Drop 3. The third voice from the top lowered an octave. The dropped voice becomes the bass, which is why a string is skipped. DmMaj7b5 has 1x012x, x4x131, 4x363x, x5x664, 9x676x, x8x799, 10-x-11-10-9-x, x-11-x-10-14-10.
Tensions. A shell of DmMaj7b5, root, third and seventh, leaves a string free, and the tones that belong over it are the 11 (G) and the b13 (Bb).
The common shapes and the derived voicings come from different places, and both are explained in where the chords and the theory come from.
Shows each chord the way this style would voice it, and marks which of its alternatives belong to the idiom.