The command format for adding a module can be improved according to your notes on command format part of the User Guide. Perhaps addm m/MODULE_CODE p/PLAN_NUMBER s/SEM_NUMBER [g/GRADE] would be more standardised. You can then proceed to explain that modules can be added with and without a grade attached.

The command format for adding a module can be improved according to your notes on command format part of the User Guide. Perhaps
addm m/MODULE_CODE p/PLAN_NUMBER s/SEM_NUMBER [g/GRADE]would be more standardised. You can then proceed to explain that modules can be added with and without a grade attached.