ShapeAnnotation would be another candidate for adding such properties if we can settle on names.

@oxyplot/admins does this API look OK? Not wild about ChangeOpacity now that I look at it again, but can remove that and keep the other changes otherwise.

Any preference between Border/Background for naming per ermakrs from @colejonson66 ?

Border sounds more adequate at first, however the property TextBackground doesn't make sense when renamed to TextBorder. I guess we'd have to do TextBorderBackground then. TextBorderStroke, TextBorderStrokeThickness and TextBorderPadding would be fine however.

Currently I would tend to leaving it at Background, but could be convinced otherwise.

ChangeOpacity is fine in my opinion, ChangeAlpha could also work.

Looking at this quickly now, I'm tempted again by TextBorderStroke and TextBorderThickness, leaving everything else as is. If that's agreeable, then I'll make that change and I think we should get this merged.

Sounds good to me!

Then I don't like TextBackgroundPadding... I think TextBorderBackground is OK, so I've changed to Border everything (rather than TextBackground and rebased. I don't know if you're convinced by the new naming, however.