Hello,

I am new to ConTeXt and I have looked on the internet for a way to do
something special. Unfortunately I have not found any solution.

I hope this is the right place for such a question. I apologise otherwise.

I would like to highlight (e.g. put in bold, or change the color...) any
character on a page which sits on a chosen path. I would like to be able to
position for instance an invisible circle on a page and have all the
characters "in contact" with this circle change color so that the circle
become visible via these characters. Is it something I could do with
ConTeXt?

Thanks in advance.

Aurelien