Pages and folders
Open the Action menu > Edit menu > Drag the page/folder down from the top menu to the field with the text "Drag pages or folders here to hide them from menu.".
The page/folder is then hidden from view, but still accessible with a direct link or for administrators in the Action menu > List all pages view.
Hiding pages/folders can be convenient for administrators, as they can work on certain pages without having them visible for participants. Once the page is ready, it can be revealed by dragging it back into the top menu.