For a balanced face, your injector may adjust not just volume but also lip tilt, corner support

https://www.livebinders.com/b/3703430?tabid=6ced6f2e-d7cd-3b66-3ab7-2c72c4be0fa8

For a balanced face, your injector may adjust not just volume but also lip tilt, corner support, and the projection of the central pout.