Scrolling Navigation Bar feature is available for two Layouts: Both Sided and One Sided.

Enable Scrolling Navigation bar from:

Go to Story Timeline >> Content >> Advanced Settings >> Navigation Bar.
Post Timeline >> Content >> Advanced Settings >> Navigation Bar.

Navigation Bar Styles: It has three different Styles of Navigation bar i.e., Style 1, Style 2 and Style 3.

Navigation Bar Position: Left or Right.

View Live Demos of Navigation bar here.