Patent ID: 7705864

Claim:
A method of controlling a display controller system to provide a display surface zoom, said display controller system having a main surface in a frame buffer memory, at least two displays, including at least one zoom display device, and output to the at least one zoom display device, the method comprising: receiving user input defining coordinates of a frame portion within said main surface in the frame buffer memory; determining a resolution of said at least one zoom display device and adjusting a scaling factor of said portion defined by said user input to correspond to said resolution; causing said display controller system to implement said display surface zoom to provide a zoomed view of said portion on said at least one zoom display device; in said display controller system, scaling said portion of said main surface in the frame buffer memory; in said display controller system, converting said scaled portion of said main surface in the frame buffer memory into a display signal; causing at least a first one of said displays to display a main surface view of said main surface in the frame buffer memory and outputting said display signal from said display controller system to said at least one zoom display device to cause simultaneous display of the main surface view on the at least first one of the displays and a view of the scaled portion on the at least one zoom display device; and updating in real time said zoomed view and said main surface view in response to an edit made to said main surface in the frame buffer memory.