Font guru wanted

[Lutz Müller <lutz users sourceforge net>]

Hello!

I am working on #120103 (enlarging pages). For that, I need to figure
out how to split a letter vertically or horizontally. For example, I
need to only print the left 20% of a letter. 

Does anyone have an idea on how to do that?

Thanks for any hints!
-- 
Lutz Müller <lutz users sourceforge net>