Abstract: A license plate frame that provides great versatility in displaying a user-changeable message on a portion thereof. The design provides a channel adapted to receive individual, planar tiles, each typically bearing indicia. Blank spacer tiles may also be provided but, because of the novel locking mechanism, are unnecessary. Tiles may bear indicia consisting of letters, numerals, punctuation marks, symbols, phrases, or other graphics such as logotypes. Also because of the unique tile locking mechanism, tiles may have varying width and it is unnecessary to pad out an entire row of tiles. This allows, among other things, the use of proportional type fonts. Secure channel end locks keep tiles from being easily removed, thereby preventing theft or vandalism. The combination of tile locking and channel end locks provide a rugged system that may withstand automated car washes and other environmental onslaughts.