A long timeline story takes time to scroll through various events, Cool Timeline pro can help you with making out a compact scroll bar for a very long story timeline. 

• Enable Scrolling Navigation: To enable/disable the scrolling navigation menu. A scrollbar with story years will be shown to fast scroll to the stories.  Check out the Demo link here.

• Scrolling Navigation Position: To choose the position for the scrolling navigation menu. 
• Enable Pagination: By default, the timeline only shows the selected number of stories on the page (stories per page) and generates pagination for other stories. This setting can be used to disable the pagination for other stories.