During your command file, you may want to give instructions to the user, highlight certain Windows, or simply provide the user with information about the processing steps. There is a variety of different ways to display messages during a command file; some messages stop command file execution until the user makes a decision or "Okays" the message, while others simply display the message on the screen for a fixed length of time, then disappear. A number of special command file functions which begin with the "@" symbol are discussed in this section; see the section above, "Special Command File Functions", for more detailed information on these functions.