Many commands have abbreviated forms.  The different forms are shown separated by the / character.  So, for example, the command HELP/H means that you can enter either HELP or H.

 

All commands can be entered in any case, so HELP is the same as help or Help.

 

Some commands have alternative options.  These are shown separated by the | character.  So, for example, ON|OFF means that you should enter ON or OFF.

 

Some parts of the commands are optional.  Optional parts are shown in square [] brackets.