docs: Describe options that allow the colorbar to appear larger

[NiallMac]

Simple question probably - how to I make the colorbar larger when using enplot? I made the attached with enplot(m, colorbar=True) but the colorbar is too small to read.

Thanks!

[zatkins2]

Try using the downgrade kwarg in enplot. Otherwise I think this is rendering the map "full size" but then whatever environment is actually plotting it reduces the size of the entire image to fit in the window. I guess the size of the colorbar is a fixed number of pixels or something, so by "downgrading" the image it makes the colorbar (and tick marks) larger in relation. It also makes it much faster/less memory to plot and (usually) doesn't sacrifice important details. I've found that downgrade=16 gives good size colorbar/ticks for a full-res ACT map (and downgrade//dg for ACT maps downgraded by a factor dg...)

[AdriJD]

The --font-size option (or font_size kwarg in python) allows you to increase the size of the fonts and also increases the size of the colorbar.

[mhasself]

It would be great if we left this issue open until this very useful advice is propagated into the docs.

[NiallMac]

Thanks all!