##### Command Entry

Very long commands are entered on multiple lines by appending an ampersand (&) to the command line. After you press `ENTER`, NeXtMidas prompts you for more command input on the next line.

    nM>fft data &
    ->fftout &
    ->1 1024

##### Command Completion

A question mark (?) appearing at the end of a partial command line prompts NeXtMidas for command arguments. For example,

    nM>status ? <ENTER>

gives the prompt:

    FILE=

You can also use the question mark halfway through a command line. If you filled in some of the arguments but forgot the rest of the syntax, type a question mark and hit `ENTER`. The arguments you already filled in become default values for the prompt. After each prompt, NeXtMidas displays the completed command line which you can either edit or press `ENTER` to execute.

##### Execution Mode

To explicitly direct a command to the operating system, precede it with a dollar sign ($). This avoids command ambiguity. For example, typing `HELP` at the NeXtMidas prompt invokes the NeXtMidas `HELP` command, but `$HELP` invokes the help facility of the operating system.