| 
            plsfont
          ( | family , | 
| style , | |
| weight ); | 
Sets the current font. See the section called “FCI” for more information on font selection.
family
          (PLINT
            Font family to select for the current font. The available
            values are given by the PL_FCI_* constants in
            plplot.h.  Current options are PL_FCI_SANS, PL_FCI_SERIF,
            PL_FCI_MONO, PL_FCI_SCRIPT and PL_FCI_SYMBOL. A
            negative value signifies that the font family should not be
            altered.
          
style
          (PLINT
            Font style to select for the current font. The available
            values are given by the PL_FCI_* constants in
            plplot.h.  Current options are PL_FCI_UPRIGHT, PL_FCI_ITALIC
            and PL_FCI_OBLIQUE. A
            negative value signifies that the font style should not be
            altered.
          
weight
          (PLINT
            Font weight to select for the current font. The available
            values are given by the PL_FCI_* constants in
            plplot.h.  Current options are PL_FCI_MEDIUM and PL_FCI_BOLD.
            A negative value signifies that the font weight should not
            be altered.
          
      Redacted form: plsfont(family, style, weight)
    
This function is used in example 23.