Front bumper and Parking Sensor removal

[dangerdred]

Thanks, great write-up. I'm going to have to remove my own FL front bumper to replace at least one of the parking sensors and also to repair some damage when the bumper was grounded on a kerbstone.
I'm not understanding the necessity for Lift mode as well as Jacking Mode when lifting the car? I've only ever used Jacking Mode. Is the idea of using Lift Mode so as to have more room to work while removing the wheels?