Using a Dialog Box MS-DOS Help displays dialog boxes when you choose commands that have options. Dialog box action With a mouse With a keyboard ═════════════════ ═════════════════════════ ═════════════════════════ Select a text box. Move the mouse pointer to Press TAB until the the text box, then click cursor is in the text it. box. Choose an option. Click the option. Move to an option with the direction keys. Turn a check box Click the check box. Use TAB to move the on or off. cursor to the check box, then press the SPACEBAR. Choose a command Click the command button. Use TAB to move the button. cursor to the command button, then press ENTER.