Can't make "Section" and "Subsection" work
I have a book where I need to work with Section/Subsection variables, but I can't make them work. The tabs for Section and Subsection are inactive.

I have added the variable both to master pages and to paragrah styles, but the tabs stay inactive. Volume, Chapter, Page, Footnote work as they should. Is there something here I don't understand or is this a bug?
FrameMaker Version: 17.0.4.628, Win 11


