Class Main Function
The game already automatically assigns each ship class a ‘main function’, such as warship, terraformer or troop transport. This ‘main function’ is used for auto-assignment purposes and is shown at the bottom of the class summary.
For v2.8, you can override this manually using a dropdown on the Miscellaneous tab of the Class Design window.
Once this is set by a user, it will no longer update automatically with class design changes.