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Chapter 4: MGA Display Properties and MGA PowerDesk
PanLOCK
PanLOCK enables or disables panning. When enabled you can
move your mouse pointer to the edge of the view area to pan in
that direction. This feature can be used if you have a virtual or
zoomed desktop.
Zoom (PixelTOUCH)
Zoom uses the MGA hardware to instantly zoom your desktop
by a factor of x2 or x4. When zooming, you are working with a
pseudo-virtual desktop. Moving the cursor to the different
edges of the screen will pan your display to different portions
of the Windows desktop. You can change the zoom factor by:
Using the Zoom buttons in the MGA Control Panel dialog
box; or
Using the PixelTOUCH hot key. The PixelTOUCH hot key,
when enabled, toggles in a circular order through the three
zoom factors (x1, x2, x4, x1, ...); or
Using QuickDesk. To zoom in or out of the current view,
simply click on the ' +' or ' -' button.
Note the following:
The x4 zoom is not available at resolutions of 800x600 and
lower;
The display pans 32, 64, and 128 pixels at a time at zoom
factors of x1, x2, and x4, respectively;
The PixelTOUCH hot key does not work in a DOS shell.
Acceleration features
The option Device Bitmaps when enabled, stores bitmaps in
the Matrox Corona's overlay (VGA) frame buffer (off-screen)
instead of the RAM on your PC (Host RAM).
The Device Bitmaps option has been proven to improve
performance when used with some applications. However,
with certain applications, the display is redrawn incorrectly
if this option is enabled. If this happens, disable the option
when using that application.
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Troubleshooting
