A printing device for printing labels having a memory for storing one or more character sets, each character set including at least a principle character and an additional character which is associated with the principle character; a user input having character selection keys for selecting a character set to define an image to be printed by the printing device; and a controller for accessing characters from the memory to be displayed and printed which correspond to characters selected at the user input means; wherein actuation of a character selection key selects the principle character in the selected character set and maintaining activation of the character selection key for a predetermined time period selects the associated additional character.