- The Manual Way:
  - Often it is easiest to create an option tree manually. This provides more flexibility than is available with `OPTION/CREATE`.
    1. Make the directory structure required. It may look like this:

           /home/student/myopt123
             +- nxm
                 +- myopt
                      +- cfg
                      +- prim
                      +- mcr
                      +-  :

       You do not need to include any directories you don't intend to use.
    2. Copy the template `commands.cnf` file from `$NMROOT/nxm/sys/cfg/commands.template` and place it in the `cfg` area of your new option tree.
    3. Use the `OPTION` command to tell NeXtMidas where the option tree is located.

           nM> option myopt /home/student/myopt123/nxm/myopt

    4. That's it.