Explanation
A capo on the 2nd fret raises the sound by a whole step: a G shape sounds like A. The guitarist plays comfortable chords while the song stays in the vocalist’s key.
Example
Key of A, capo on the 2nd fret: play G – D – Em – CHow it works in Kinor
When you transpose, Kinor suggests which fret to put the capo on so you can play familiar chords.