The given coord(s) (if any) are those that are plotted on the x axis (and y axis) (correct me if I'm wrong). It's not the coord(s) that are animated across or through. This is a little like the trouble with the izip and slices docstrings. Perhaps we could use/adapt the revised wording from those docstrings.

@pelson - do you think we can get this in today before creating the 1.4.x branch?