42 PCA-6144V User's Manual
Advanced features (Virtual Screen Control)
Virtual Screen Control
Standard display resolutions are 640x480, 800x600, 1024x768,
1280x1024. The amount of display memory used depends on the
selected resolution and color depth. A substantial amount of
display memory is left unused for lower resolutions. The Virtual
Screen features take advantage of this unused memory by “expand-
ing” the display area into the off-screen area.
Virtual Screen Control allows the user to make effective use of a
display screen larger than the standard 640x480, 800x600 or
1024x768, and the standard resolution is the center of the screen.
The user can “pan” around the larger Virtual Screen area by the
use of a standard mouse or a set of “HOT KEYS.” For example, it
is possible to select a resolution of 640x480 and set the Virtual
Screen size to 800 x 600. Thus, the 640 x 480 screen sits at the
center of a 800 x 600 matrix, and the user can “pan” through the
entire 800x600 matrix in a 640x480 window, as shown below.
Panning allows traversing a larger screen through a smaller window.
VIRTUAL SCREEN AREA
ACTUAL DISPLAY AREA
