Patent ID: 7904513

Claim:
A client apparatus for use in a thin client system comprising a server apparatus configured to generate, as a virtual image, display data to be displayed by the client apparatus, the client apparatus being connectable to the server apparatus, receiving the display data generated by the server apparatus and supplied from the server apparatus via a network, and displaying received display data, the client apparatus comprising: a display unit with a display screen comprising a constant display area and a normal display area, wherein the constant display area is configured to display the received display data with fixing a display position of the received display data to a fixing position and the normal display area is configured to display the received display data with maintaining a display position of the received display data; a memory configured to store a portion of the display data of the virtual image to be displayed in the constant display area of the display unit and an area range of the constant display area, the area range indicating a position of the display unit which displays the portion of the display data, the portion and the area range being associated; an extraction unit configured to extract the portion of the display data which is received and to be displayed in the constant display area based on the area stored in the memory; and a display controller configured to constantly display the portion of the display data which is extracted by the extraction unit in the constant display area; a designation unit configured to arbitrary designate the portion of the display data to be displayed in the constant display area of the display unit and the area range of the constant display area which displays the portion of the display data, and wherein the portion of the display data and the area range of the constant display area designated by the designation unit stored in the memory.