#### Positional

Command parameters are either positional or keyword (tag=value) pairs, as in

    nM> wave s1,,shape=sin,,freq=15e3

Parameters are listed in a specific order on the command line. `DEFAULT` <command> shows you the position and default value of positional parameters.

You do not always need to enter all command parameters. By using repeated commas to indicate missing parameters, NeXtMidas substitutes defaults for them. In the example above, the repeated commas replace the two missing parameters: element and amplitude. If the key= is omitted, the key is obtained from the command dictionary by its position-dependent (PD) index.