Xerox Corporation

William K English

William S Duvall

A data processing system comprises a first selection device for selecting a plurality of characters of a first set, the characters of the first set each being defined by a bit map of first predetermined dimensions. A second selection device is capable of selecting a plurality of characters of a second set, the characters of the second set each being defined by a bit map of second predetermined dimensions greater than the first predetermined dimensions. A display device is capable of displaying the selected characters of the first and second sets, and a control device is responsive to the first and second selection devices for controlling the display device to display the selected characters of the first set in a first display area and the selected characters of the second set in a second display area, the first dislay area representing a page of text of characters of the first set, and the second display area representing a magnified portion of the page of text comprised of characters of the second set.

Data processing system with multiple display apparatus

A data processing system comprises a first storage device for storing character font data representative of a plurality of characters, each character being represented by the font data as a bit map of predetermined dimensions, the plurality of characters being stored in an ordered storage sequence. An image presentation device is capable of visually presenting an image comprised of preselected ones of the characters on a predetermined background area. A second storage device is capable of storing a bit map representation of the image, and a visual control device is capable of controlling the image presentation device to visually present the image in accordance with the character font data stored in the bit map representation of the image in the second storage device. A third storage device is capable of storing a list of identification data for at least some of the preselected characters to be visually presented, the identification data identifying the type and style of each character as well as its desired location on the background area. Finally, a data control device is capable of controlling the processing and handling of character font data and comprises a sorting device for sorting the identification data in the third storage device into the ordered storage sequence, an accessing device responsive to the sorted identification data for accessing from the first storage device in the ordered storage sequence the character font data for each character identified in the list, and a loading device for loading the character font data for each accessed character into the bit map representation in the second storage device at a location defined by the identification data for that character.

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Tokyo, Japan

William K English