unable to set some font size?

[ox1222 0]

Hi everyone,

 

I tried to set large font size in KDE with Mandrake 9.2 environment.

I can set almost all the font size by clicking and adjusting the setting in the following path: configuration--> KDE--> LookNFeel--> Fonts

 

 

However, I am not able to change the font size in the welcome to Mandrake linux manue, Mandrake control center[local host], and the text on the tool bar of the Mozilla Firebird (which I installed). The font size on these manues and application software are very hard to read, because they are too small.

 

How can I make the adjustments to larger fonts??? please be specific. (i'm new to Linux)

Thank you.