Can I annotate graphs with special characters?

["Baghurst, Peter(PUBLIC_HEALTH)" <baghurstp@wch.sa.gov.au>]

Hi all,
 
Does anyone know of a way to annotate plots with special characters (like
<alpha> and <beta> for example) from a command line - or can this only be
done through the GUI?
 
Many thanks
Peter Baghurst

__________________________________________________ 
Assoc/Prof  P. A. Baghurst, 
Public Health Research Unit, 
Women's and Children's Hospital 
72 King William Rd 
North Adelaide 
SA    5006 
Phone: +61-8-8161 6935 
Fax: +61-8-81616906 
__________________________________________________