I would like to add roman numerals instead of arabic page numbers to my document, but the "Numbering and Section options" is grayed out. I'm running InDesign 15.1.2 on a Mac laptop. It doesn't seem to matter whether I have a text box with nothing in it, or if I have already chosen [Insert special characters < Markers < Current page number] (as the screen shot shows below). Please help! Thank you!