Abstract: A variable size and position character generator is described for use with a cathode ray tube raster scanning system to display characters as matrices of dots. The keyboard includes controls for permitting a user to select a particular height, aspect ratio and baseline for each character selected to be displayed. A unique character address signal is developed for each such selected character and serves to identify a unique, fixed size dot matrix for the selected character which is stored in a first read-only memory. A character converter, in the form of a second read-only memory, receives the selected height, aspect ratio and baseline information signals along with normal scan line counter signals and modifies the latter to develop scan control signals that are fed to the first read-only memory for controlling the height and position of the character selected to be displayed.