In the directory tree, the current directory is marked by the selection cursor, a dotted rectangle around the highlighted icon and text. To change to a different directory, you simply move the selection cursor.
You can also control the level of directory information shown in a directory window. When you first start File Manager, the directory tree shows the first level of directories on the current drive. You can use the commands on the Tree menu to expand and collapse the directory information shown. Under the Tree menu, you can also have File Manager indicate expandable, represented by file folders with plus signs (+) displayed on them. When these directories have been expanded, they are represented by open file folder with minus signs (-) displayed on them.
When you expand a directory, the names of the subdirectories in that directory are displayed in the directory tree. You can expand an entire branch, a single level of the branch, or all branches. To collapse an expanded branch, simply click on the opened parent file, and the branch will close.