as Rafail said, it's in \themes\YOURTHEME\plugins\default\theme\page\elements\topbar.php

it starts at the point where it says: <div class="topbar">

there is also a comment right before it (at least on goblue, not sure about other themes) that says: <!-- ossn topbar -->

just fyi, HTML is not really "code" or a "programming language" per se, it's only a markup language (php is considered a scripting language, but if all you want is to modify the top bar, you don't really need to know anything besides basic html and maybe just the basics of how php and html work together). If you don't know at least some basic HTML, you're not going to be able to modify the top bar on your own. if you want to hire someone to help you with this, you can feel free to email me.

Hi Mary
The Component was created by Arsalan, I think he will see our comments and answer us
however, it is not very difficult to modify some files... google it's your friend
create lots of backups and try to make the changes yourself ;) so you will learn to write code yourself ;)
That's how I started.

Best Regards, Raphael

Hello guys
I'm not an expert but maybe you can do it by writing code in the file : Topbar.php

components\OssnNotifications\plugins\default\notifications\page\topbar.php
or
\themes\YOURTHEME\plugins\default\theme\page\elements\topbar.php

Hey Rafail, thanks, however it seems with this component you can't add to the top bar, only submenu. The top bar would be ideal really

Hello Tiago

Check this component
https://www.opensource-socialnetwork.org/component/view/3377/menubuilder