Several options may be set in the MIF 3.00 driver.
Syntax:
set terminal mif {color | colour | monochrome} {polyline | vectors} {help | ?}
colour plots lines with line types 6#6= 0 in colour (MIF sep. 2-7) and monochrome plots all line types in black (MIF sep. 0). polyline plots curves as continuous curves and vectors plots curves as collections of vectors. help and ? print online help on standard error output -- both print a short description of the usage; help also lists the options.
Examples:
set term mif colour polylines # defaults set term mif # defaults set term mif vectors set term mif help