How can I utilize the touch and drag feature effectively in my camera settings?

How can I utilize the touch and drag feature effectively in my camera settings?
Go to AF menu #5. The first option "Initial Servo AF pt for (face). Change that from AUTO to the top option.
This allows you to drag a box to your subject and it will then track that face/eye only.
With using AUTO you get the issues the camera wanting to track people that aren't necessarily your subject.