This template is used on many pages and changes may be widely noticed. Test changes in the template's /sandbox or /testcases subpages, or in your own user subpage. Consider discussing changes on the talk page before implementing them.
The syntax is the same syntax used for {{navbox}} with the table placed between the {{navbox top}} and {{navbox bottom}} templates. Any content that would normally appear before the first list (list1) should be passed to the top template, and any content that would normally appear after the first list (list1) should be passed to the bottom template. Any content passed through |list1= is ignored.