- Using `DEFAULT <command>`:
  - The `DEFAULT` command lists the default values for a command. For example:

        nM> defa mess
        INFO: ME*SSAGE;SYS        I,6     ,FUNC=QUERY,ID=,MSG=,NAME=,INFO=,DATA=,
        INFO: MESSAGEL*OG;SYS     P,4     ,,,ROWS=20,COLS=132,

- What it shows:
  - The full name of the command.
  - Type of command (M=Macro, P=Primitive, I=Intrinsic).
  - Number of parameters.
  - Default values for the parameters (in order).