change key

10 LETTERS · STARTS WITH C

change key is a valid 10-letter word worth 22 points in Scrabble and 23 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

C3H4A1N1G2E1K5E1Y4

3 + 4 + 1 + 1 + 2 + 1 + 0 + 5 + 1 + 4 =22 PTS

DOUBLE WORD → 44TRIPLE WORD → 66

MEANING

What does change key mean?