plfont: Set character font 

DESCRIPTION:

    Sets the default character font for subsequent character drawing. Also
    affects symbols produced by plpoin.  This routine has no effect unless
    the extended character set is loaded (see plfontld). 

SYNOPSIS:

plfont(font)

ARGUMENTS:

    font (PLINT, input) :    Specifies the font: 1: Normal font (simplest
    and fastest) 
        2: Roman font 
        3: Italic font 
        4: Script font