+% Only show three levels in the table of contents. Passing level= to
+% setupcombinedlist didn't seem to work, so we'll do it like this.
+\definecombinedlist [content][chapter,section,subsection]
+% Use the c alternative for the toc, which uses dots between the section
+% name and the page number.
+\setupcombinedlist [content][alternative=c]
+