Text Background Manipulation

[SimianSamurai]

Hi!!

Awesome app!! I'm greatly enjoying it!

I was wondering if, in the Markup Layers editor, there is a way to change the size of the background of a text block relative to the text? I know you can change the size of the entire object, text included, but I'd like to be able to affect the background after it has been coloured, and maybe affect the shape of it as well, ie; add rounded corners.

Is there a way to do this?

Thanks!!