Set drawing mode. Note only one device driver (cairo) currently supports this at the moment. See also plgdrawmode(3plplot).
Redacted form: plsdrawmode(mode)
This function is used in example 34.
- mode (PLINT, input)
Control variable which species the drawing mode (one of PL_DRAWMODE_DEFAULT, PL_DRAWMODE_REPLACE, or PL_DRAWMODE_XOR) to use.