Does anybody know how to change the font and fontsize in graphs in Maple?
http://www.indiana.edu/~statmath/math/maple/plotting/ has examples like
p3 := textplot( [0, .75, `Gradients are normal to level curves!`],
See http://bilbo.math.uic.edu/maple/man/options.html (which is what you'd get if you highlight plot, hit F1 for help, then follow the link for "options").
Separate names with a comma.