The keyboard is used to issue commands and supply parameters to MGED. It is also used to login and logout of the UNIX system, and to run other UNIX programs. All characters typed on the keyboard, with the exception of the user's password, are displayed (echoed) on the monitor. In this text, all input typed by the user is shown in italics, while all literal MGED output is shown in typewriter font. All entries are terminated by depressing the RETURN key. This action immediately precedes the execution of the directive. In most cases, lower case letters must be used. A space must be used between the command and its arguments. Embedded blanks are not allowed. Entering Control/H causes cursor to backspace and erase entered information. An MGED command is interrupted by entering Control/C. End-of-File is sent to MGED by entering Control/D. The graphics editor displays the prompt
mged>on the display whenever it is ready to accept a command from the keyboard.