Written by Navigation Bar in Microsoft CRM has a new change introduced in CRM 2016 (also CRM 2015 update 1). This is now more user friendly and options are more easy to choose from.
The tiles are smaller, so more fit into a grouping, while the bar at the top is wider and easier to see. These size changes make this navigation style easier to use on mobile devices like cellphones and tablets, and the group arrangement allows for faster access to the areas you’re looking for.
Dynatecon Solutions 