In the End view the set of sections is available. The panel with buttons at the top of the Main screen is designed to manage sections and access to information they provide in a fast way.
Clicking one of the buttons shows a pop-up window with the corresponding section:
The buttonat the top right corner of a pop-up section or the double-click on the header of the section pins/unpins the section to the page.
The names of the unpinned sections are underlined in the panel.