How To Use MS-DOS Help Choose a topic below. To choose a topic, click it. Or, press TAB until you select the topic, and then press ENTER. To exit MS-DOS Help, choose Exit from the File menu. Or, press ALT and then F. Then press X. How to Use MS-DOS Help Provides information about: - Navigating through MS-DOS Help. - Finding the topics you want in MS-DOS Help. - Using the MS-DOS Help menus, commands, and dialog boxes.