The file tree is only used when working on a site, rather than an individual page. It allows you to open pages in the editor, or view other file types with the external application specified for that mime type.
Support is also there for copying, moving, and renaming files. With some HTML editors if
you have a group of files in a project and you move or rename one of them then you need to
manually go through and update all the links to that file in all your other documents. Not with
SCREEM. This is automatically done for you, going through the entire site.
The updating of the links in a page that has been moved is not currently
implemented.
A right click anywhere on the file tree will popup a menu, allowing you to: