resolution of ppm output

Does anyone know if there is a way to increase the resolution of ppm output?
I am painting our maps through the p.select, p.map "script file" procedure.
The resolution of the vectors and text in the resultant paint.ppm file is very
poor. Am I stuck with this or is there a way of increasing the resolution?

Any help with this problem will be greatly appreciated.

Thanks in advance,

Barry

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Dr. Barry B. Baker | Phone: (303)490-8322
Great Plains Systems Research | FAX: (303)490-8310
USDA-ARS | E-mail: barry@gpsrv1.gpsr.colostate.edu