Edit "Frame Below Pgf" options
Hi There,
I am currently trying to add a thin grey horizontal line below the headings in my document. I am able to use the "Frame Below Pgf" option in the paragraph designer to add a black line, but I cannot for the life of me figure out how to edit the colour or weight of the added line.

Would anybody be able to point me in the right direction where I can edit the available lines?
Thanks in advance!
