Feature request: Completing the (legend) square

[urob]

At the risk of sounding greedy, now that we have b701cef, I'd love to see the option to also add legend types for the 4 corners.

If you are fine with a quick & dirty implementation that basically mirrors b701cef, I'd be happy to make a PR. But outlining the changes, my sense was that at this point you probably would want to refactor things a bit to avoid repetition, which you would be in a much better position than me to do well.

In either case, let me know if this is something you'd be open to and whether you'd prefer a simple PR or rather first ponder about a cleaner approach.

[caksoylar]

Hey, I guess we can add those too, sure. I am having a bit of trouble with naming, I don't want to add topleft/bottomright etc. I thought maybe we have a new set of upper-case aliases T/B/L/R (and maybe C for center) and their combinations TL etc. for diagonals.

If you want to make a simple PR that might help move things along, I can refactor on top of it if I want to.

[urob]

Sounds good. Next 1-2 weeks are busy, will cook something up after.