Choose Show Hidden Objects from the View menu.
Choosing the command a second time again reverses the toggle (from shown to hidden and back again).
The criterion for hiding or showing a file or folder is based on its data type. Use the Set Filter Options command to change which data types are shown and hidden. (See " To Specify Which Data Types Are Hidden" below.) The default hidden data types are DOT_FILE, DOT_FOLDER, and CURRENT_FOLDER.