Editing Template:Navbox/doc (section)

=== Advanced parameters ===
:; ''titlegroup''
:: This puts a group in the title area, with the same default styles as ''group<sub>n</sub>''.  It should  be used only in exceptional circumstances (usually advanced meta-templates) and its use requires some knowledge of the internal code of {{tl|Navbox}}; you should be ready to manually set up CSS styles to get everything to work properly if you wish to use it.  If you think you have an application for this parameter, it might be best to change your mind, or consult the talk page first.

:; ''titlegroupstyle''
:: The styles for the titlegroup cell.

:; ''innerstyle''
:: A very advanced parameter to be used ''only'' for advanced meta-templates employing the navbox.  Internally, the navbox uses an outer table to draw the border, and then an inner table for everything else (title/above/groups/lists/below/images, etc.).  The ''style''/''bodystyle'' parameter sets the style for the outer table, which the inner  table inherits, but in advanced cases (meta-templates) it may be necessary to directly set the style for the inner table.  This parameter provides access to that inner table so styles can be applied.  Use at your own risk.