Em to C
How to transition from an Em chord to a C chord.
The Em → C transition is the same vi → IV move in the key of G or any key where you're playing an open G shape.
Chord shapes
Play the full open Em chord and rotate your wrist as you leave your second finger on the D string and move to the full open C chord.
EmFull
CFull
Anchor fingers: finger 2 on D string (fret 2)