▄ Directory Tree
When you want to use the directory tree, press Tab until the tree is highlighted, click the tree, or use the hot key to get to it.
Once you're at the tree, you can press an arrow key to select a directory or disk name. Press Enter to show the contents of the selected directory.
You can also double-click a directory name to show its contents.
When you're positioned on a subdirectory, press Enter to view the files in that subdirectory (using the current file-name mask).