I've looked through the documentation, and see that it's possible to
plot a variety of symbols, including some customization, but what I'd
really like to do is use a text character as the point marker. The
only way I can think of doing this right now is to annotate the point
(with zero offset) with the text in question, and somehow hide the
actual point itself (is that even possible?).
Is there something easier/more obvious that I'm missing?