This is an example of a page linked to from an item in the menubar.

When the drop-down menu is enabled, there are sub-menu items available. Select any of them to receive more information about the subject.

When the drop-down menu is disabled, there is a vertical menu in the secondary column that can be used to access the subject pages.

In the narrow-display, there is a vertical menu at the top than can be shown by tapping (or clicking) the menu symbol.