Several pages have a Passage Navigator on top. It consists of the name of the book, the chapter, and the verse. For example: Matthew 1:1.
The navigator enables you to go to another passage. Click on the name of the book to navigate to another book. In the same way you can click on the chapter and on the verse.
You can also use the keyboard to navigate. On touch screens you can swipe to navigate.
The Navigator shows two arrows: ↶ and ↷
Clicking ↶ goes back in the navigation history.
Clicking↷ goes forward in the navigation history.
There are also keyboard shortcuts for it.
A long click on any of these two arrows brings up the history menu.
Some pages display one or more clickable passages. Clicking them updates the Passage Navigator.