keyboard shortcut to highlight and un-highlight

I would love to see a keyboard shortcut to highlight and un-highlight.  Even if it needs to be two separate shortcuts, it would still be quite useful.

Thanks!

You can do a workaround as follows:

Create a new style:
 - Create a new stickie
 - R-click on stickie > Set colour
 - R-click > Save as style > Select a style

Use that style to highlight a stickie:
 - R-click on stickie
 - Set to style > Select a style

Thanks.