Well, you can do something like that now w/o the bold. If you use a TOC and on all the pages in it you flag them as not to be included in the TOC, then it will just highlight with a tan bar the chapter you are in. If this works, you can just put all the pages in the chapter in a Section and exclude the section from the TOC.As a power user, I don't think there is anything other than that right now. Even if you used a Menu instead of a TOC it does not highlight the current location. I will try some things out.The TOC is built in built in a separate page and shown in a frame on the main page. There is a separate .js file that builds the TOC dynamically depending on what you click on. Within reasonable limits you can statically format the TOC (make a line bold or bigger or a color) but not take the formatting off or add it dynamically w/o modifying the .js file.