E major is the full six-string open shape, and the same shape barred at any fret becomes the movable "E-shape" chord used throughout the I-IV-V fretboard map. This post closes the open-chord series started with A and D.

Base shape: E major

Suspended: sus4

An open Esus2 isn't practical in standard tuning without muting or a stretch that defeats the point of an "open" chord, so it's skipped here -- sus4 is the one that stays in the family of easy one-finger moves.

Minor and minor seventh

Em7 is the simplest full chord shape on the guitar -- one finger, four open strings.

Dominant seventh and major seventh

E7 is the shape used as the I chord in a blues in E (see the 12-bar blues post).

Sixth and add9

Summary table

Chord	Frets (low to high)	Change from E major
E	022100	base shape
Esus4	022200	3rd -> 4th
Em	022000	major 3rd -> minor 3rd
Em7	020000	Em, drop a finger
E7	020100	add b7
Emaj7	021100	add maj7
E6	022120	add 6th
Eadd9	024100	add 9th

From open shape to movable barre

Barre the entire E major shape at any fret and the root moves with it while every relationship above stays intact -- an F major barre at fret 1 is the same shape as the open E, just shifted. This is the shape behind the "E-shape root on the 6th string" reference in the I-IV-V fretboard map: learn the open-chord variations here, and the same finger patterns are available anywhere on the neck once barred.