textbox around axis annotations

Added by Jessica 9 months ago

I am plotting an inset graph and would like to create a textbox around the annotations on the axes so that the background image doesn't interfere with the axis. I think this should be possible maybe using gmt set FONT_ANNOT with some g or G option but cannot find instructions on the right way to do it.
I am currently using version 5.1.2 but can upgrade if needed.
Thanks for your help in advance.