how to change the color depth

[Petros Sidiropoulos]

hi all
I dont't know if this is the right place to ask sush a question, However, I
ask you
how to  change the color depth  of the screen, (I tried to replace some
lines in the XF86Config
file,(such 8bit ->16bit) but later I have a lot of output errors)

thanks
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Petros Sidiropoulos         (__)
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