The tree within QuantumCMS is the simplest way to view and manage your site. You can see all the pages within the site, the types of pages (Document, File, Redirection, etc.), and the overall structure of the site. One thing it did not do, however, was quickly show you which pages were unpublished. While you can place your cursor over any page in the tree and see a quick summary of details, including its published status, there was no way at a glance to tell what portions of your site weren't published.
We have updated the tree to now provide that information visually. As you can see in the screen capture below, some of the pages in the tree have light gray icons. Those icons indicate that a page is not published. In the example the page "TestPageBbbb" is not published, visible directly in the tree as a gray icon and also visible right on the edit screen with an unchecked Published checkbox.