The directory tree of the drive or folder scanned by TreeSize Professional can be viewed in the left pane of the main window. It gives you a quick overview of the size of each folder. You may use this tree just like a folder tree in Windows Explorer. If you place your mouse cursor on a folder you'll be shown an elaborate tool tip with detailed information if the appropriate option is active in the Options dialog.
The directory tree supports an incremental search, which is started if you start typing the initial characters of a folder name when the directory tree is the active control. It will then select the first matching folder.
With "Branch" > "Update" you may update this window; with "Branch" > "Expand" you can determine to which level the tree should show sub-folders. Try the menu bar and the context menu (right-click on a folder) in order to use more functions (see Context Menu)

