Units allow you to change which units you use for input and display. Codesign supports both Metric and Imperial Systems.
Along with your preferred units you can set the level of precision you want to use.
You can use App Settings to change the units for all new projects.
To change the units for a specific project, use the Project settings.
The Units in the Project settings are used everywhere a length or area is displayed.
By default the Units control the Input of lengths as well; You don't need to input unit types if you are just using your standard units. Eg if working in metres 3.81 is the same as entering 3.81m.
Also, you can actually enter any unit type into an input and it will be converted to the Project Units. Eg entering 6' 6" when your units are metres will convert automatically to 1.98m
While you won't necessarily need to use this imperial to metric conversion (or vice versa) it provides a versatile system for data entry. For example, you might have your Units set to millimetres, and find that it is easier to enter 5m rather than 5000.