- The `PATH` Command:
  - The `PATH` command can be used to list the current path.

        nM> path
        15S: OPT.PATH        = UCL,DSP,HWC,SYS

  - The `PATH` command can be used to add or remove option trees to the current path.

        nM> path add train
        nM> path rem ucl

  - The path command can also be used to explicitly set all of the items in the path. (See the `PATH` explain file for details.)