How can I choose the textfont used for LyX output?

[Christian Liesen]

Hi,

sorry if this is a silly question, but how can I use fonts other than 
the newcent, bookman, times etc. that are available from Document --> 
Settings --> Text Layout?

I'm on Mac OS X with LyX 1.4.4. I have a scrbook that uses newcent, but 
I'd like to use the Sabon fontface instead. The KOMA User's Guide 
doesn't say anything about changing the textfont, and I couldn't find it 
in the LyX documentations as well (or I've overlooked it).

I use pdflatex to view the file.

Any help would be highly appreciated.

Many thanks,
-- Christian