For DCP models

Press Bsymbol.utri or Bsymbol.dtri repeatedly to enter the text and press OK.
For DCP-373CW, DCP-375CW and DCP-377CW
Press Enlarge/Reduce to move the cursor to the left.
Press Number of Copies to move the cursor to the right.
For other models
Press Bsymbol.ltri or Bsymbol.rtri repeatedly to move the cursor.
Press Bsymbol.utri or Bsymbol.dtri for characters below
abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789
(space)!"#$%&'()Graphic+,-./:;<=>?@[\]^_`{│}~