did a search but couldn't find anything ... do you have a link ?

Type in the word hashtags into the search box.

Also, the search on this site is okay but not great. I often use google to find stuff. Something like: site:community.elgg.org hashtags

http://community.elgg.org/pg/search?entity_subtype=plugin_project&entity_type=object&search_type=entities&q=spotlight&category=all&submit=Search

That is, go to the plugin page and search for "spotlight".

My link tells you how to override the spotlight (and then enable it for all users). You can stop at the override the spotlight part and then add your code.

And seriously, if you type spotlight into the search here you get the following:

• The Elgg Community: How to change or delete spotlight?
• What I learnt today (how to modify spotlight)
• rise_Spotlight (a plugin that helps you customize the spotlight)
• and so on

Fatal error: Call to a member function canEdit() on a non-object in /var/www/duuit/html/engine/lib/entities.php on line 1481

was caused by geolocation plugin. fyi

You should report it to the plugin author.