XF 1.5 How to make a dropdown "available from all pages" and where to edit it?


Active member
Which template do I need to edit in XenForo so that I can make a dropdown menu that is available on every single page of my site? Like ading an onclick method on the particular menu point in question? What method would you recommend to do this?

I am trying to add a dropdown menu but due to custom style changes made from an external programmer I can not use any addon so I have to do this manually.

Your help is much appreciated.