An integer that specifies the graphics text font index.
Font index –1 selects the software fonts, which are drawn using vectors. Font number 0 selects the hardware font of the output device. See Chapter 10,
Using Fonts, in the PV‑WAVE
User’s Guide for a complete description of the software fonts. See
Appendix B: Output Devices and Window Systems for more information on the hardware fonts available with each supported output device.