The page tree lists all Pages in a folder/tree structure.

The visibility of a folder or a page is managed by permissions, see Page visibility.

The page tree can be hidden and shown by clicking  .

Clicking on a folder gives an overview of all pages and 1st-level subfolders in this folder as grid of tiles. Tiles referring to pages show the title and subtitle of the page. Tiles referring to 1st level subfolders show the name of the subfolder.