title: How can you clear a Matplotlib text box that was previously drawn?
body: <p>I can make text boxes in matplotlib fine.   But I dont see how to remove them from a rendered plot?  There seems to be no figure.text.clear() or figure.text(visible=False) after you draw a text box?  How is this done?  and unlike legends, you seem to be unable to make them draggable?</p>