If you use SharePoint Online, you already know the navigation bar (also known as Quick Launch) is displayed on the left side (as shown below).
Well, SharePoint Online now offers the ability to set an horizontal navigation with 2 options:
- Mega Menu
- Cascading Menu
The horizontal navigation bar will be displayed on top of your content, just after your site logo and title
To enjoy this new navigation style, access your SharePoint site and open the Gear menu to access the Change the look option
Then access the Navigation option and turn on the Site navigation visibility (if not yet turned on) and select the Horizontal setting