There is a detailed article on this at mandrakeuser.org

> -----Original Message-----
> From: Jonathan [mailto:hutchins@opus1.com]
> Sent: Saturday, April 21, 2001 6:13 PM
> To: 'kclug'
> Subject: DPI in X
> 
> 
> One thing I've never figured out on my RedHat/Mandrake 
> systems is how to
> force X into 100dpi mode.  It seems to default to 75dpi, and 
> I don't know
> where the master control key is.  Does anyone else know?
> 
>