The standard grips this chord is usually shown with.
Ebmaj7 is Eb, G, Bb and D, a major seventh. The shape this page opens on is written xx1333, lowest string first.

Also written EbM7, EbΔ7, EbΔ, Ebma7 or Eb major 7. The same chord either way; which spelling you meet depends on who wrote the chart.
There are 8 common shapes for Ebmaj7 on the guitar, and 33 derived voicings in 4 families.
In which keys. Every note of Ebmaj7 belongs to C minor (the ♭III), Eb major (the I), G minor (the ♭VI) and Bb major (the IV).
The common shapes, written lowest string first: xx1333, x65333, x6574x, x68786, x-x-x-8-8-10, x-x-8-8-8-10, 11-13-12-12-11-11, x-x-13-15-15-15.
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. Ebmaj7 has x657xx, 11-10-12-x-x-x, x6x03x, x6x78x, 11-x-12-12-x-x.
Drop 2. A close-position chord with the second voice from the top lowered an octave. Sits on four adjacent strings. Ebmaj7 has x1103x, xx1333, x5534x, 6657xx, x6878x, x-x-8-8-8-10, 10-10-8-8-x-x, x-x-12-12-11-11.
Drop 3. The third voice from the top lowered an octave. The dropped voice becomes the bass, which is why a string is skipped. Ebmaj7 has 3x133x, x5x343, 6x574x, x6x786, x-10-x-8-11-10, 10-x-8-8-8-x, x-13-x-12-15-11, 11-x-12-12-11-x.
Open string. An open string left ringing against a fretted grip. Because it costs no finger, it sounds a note the closed shape has none left for -- a tension on top, or a pedal root underneath. Either a familiar grip with open strings added, or a shape so sparse the open strings carry the chord. These belong to their key rather than to a shape, so D, A, G and E have many and Eb a handful. Ebmaj7 has 6600xx, xx0066, 6x006x, 3300xx, 3x004x.
Tensions. A shell of Ebmaj7, root, third and seventh, leaves a string free, and the tones that belong over it are the 9 (F), the #11 (A) and the 13 (C).
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.