In transaction SFW2 you can:
You can also use the Object Navigator (transaction SE80) to create business functions. To do so, in the context menu of a package, choose Create → Other (2) → Business Function.
The system checks whether you have specified all the parameters correctly.
After all prerequisites are met, the system sets an Active status to your business function. Refresh the transaction to see the updated status.
Maintaining Attributes of Business Functions
Using this procedure you have created a new business function, assigned a switch to it, and activated the function for further usage.