Root on A string
x78x89
Edim7 is the E diminished 7 chord. Its notes are E, G, B♭ and D♭. Stacked minor thirds. Its symmetrical sound makes it useful as a passing chord.
x78x89
Numbers show frets from the low E string to the high e string; x means don't play that string.
Every E, G, B♭ and D♭ on the first 12 frets. The filled dots are the root, E. Build your own shape from any nearby group.
Other E chords
Other diminished 7 chords