Setting Scren Size

[m b]

Hello,
 
The display control panel in YDL 3.0 has an option
that lets you enter the screen width and height and
calculates the DPI based on these numbers. At it's
current settings (1152*864) my screen is 10 mm too
wide and 10 mm to short so I thought I could correct
this using this option. But adjusting these values
makes no difference ar all - next time I login or
restart the desktop still runs too wide and I have a
black band above and below the screen.
 
I have a ATI Mach 64 3D Rage II card, use the ATI
driver.
 
Any idea how can I resolve this?
 
Thanks

Marc

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