Board Thread:Support Requests - Getting Technical/@comment-4960207-20130221185310/@comment-4018164-20130221203347

I suppose your navbox is based on a table. If so, add to its top (the opening of the table, where you can add style and stuff): class="mw-collapsible" If you want it to be collapsed by default, add instead: class="mw-collapsible mw-collapsed" For some further help, you should check Help:Collapsing.