I don't use emacs' artist mode often enough to remember all of the keystrokes and finding the reference sometimes is effort than it's worth.

To enable:

M-x artist-mode

to disable:

C-cC-c

Here is the list of commands from the artist.el file:

C-cC-aC-r  artist-toggle-rubber-banding
C-cC-al    artist-select-op-line
C-cC-aL    artist-select-op-straight-line
C-cC-ar    artist-select-op-rectangle
C-cC-aR    artist-select-op-square
C-cC-as    artist-select-op-square
C-cC-ap    artist-select-op-poly-line
C-cC-aP    artist-select-op-straight-poly-line
C-cC-ae    artist-select-op-ellipse
C-cC-ac    artist-select-op-circle
C-cC-at    artist-select-op-text-see-thru
C-cC-aT    artist-select-op-text-overwrite
C-cC-aS    artist-select-op-spray-can
C-cC-az    artist-select-op-spray-set-size
C-cC-aC-d  artist-select-op-erase-char
C-cC-aE    artist-select-op-erase-rectangle
C-cC-av    artist-select-op-vaporize-line
C-cC-aV    artist-select-op-vaporize-lines
C-cC-aC-k  artist-select-op-cut-rectangle
C-cC-aM-w  artist-select-op-copy-rectangle
C-cC-aC-y  artist-select-op-paste
C-cC-af    artist-select-op-flood-fill