How to change tick label size is unclear

[erykoff]

I heard from @nsevilla that it was not obvious how to change the x/y tick label size. Right now it uses the setting plt.rcParams['[x|y]tick.labelsize'] provided that was set prior to creating the skyproj. This is (a) not documented; (b) not obvious; (c) requires clobbering your general preferences.

I will add documentation about this, as well as adding overrides on initialization such that you can do something like sp = skyproj.McBrydeSkyproj(ax=ax, xtick_labelsize=XX, ytick_labelsize=YY) which should be a more obvious API.

[esheldon]

The number of such keywords could blow up quickly. Would it make more sense to allow the user to send something like a rcparams dict?

[erykoff]

Interesting question. Right now only xtick.labelsize, ytick.labelsize, and axes.linewidth are the only rc params that have been hard-coded into the map making. So these (at least) should have special handling at initialization, I think. If the user sent in a full rcparams dict I'm not sure how to make use of that for all the myriad options without clobbering the overall globals.