Keyword Position Type Description ------- -------- ---- ----------- XOPT 1 CHAR axis option for x-axis XTICK 2 REAL major tick interval on x-axis XDIV 3 INT no. of sub divisions between major ticks YOPT 1 CHAR axis option for y-axis YTICK 2 REAL major tick interval on y-axis YDIV 3 INT no. of sub divisions between major ticks