Chord conversion chart.

There are no sharps or flats between B&C and E&F, minor or seventh chords are not shown but follow the same sequence.

If you want to begin a song in "D" rather than "G" then in the "G" row in the first column, find "D" to the right. Notice this is in the brown column.
All the chords in the first column which are on the music sheet, will now be played using the chords in the brown section instead.