In this post, I will show you how to extend the SharePoint 2013 Global Navigation (Top Navigation) beyond the default of two levels.
When using the Global Navigation either within the Site Collection Navigation properties or with using Managed Metadata, the default level is set to Two within the TopNavigationMenu control in the Masterpage. By editing the Masterpage, locate the ID=”TopNavigationMenu” ASPMenu control and change the following property: MaximumDynamicDisplayLevels=”3″.
Happy SharePointing!
Worth bearing in mind that this requires your SharePoint deployment is updated to at least August 2013 CU, otherwise it will allow you to do this but won’t actually change anything.