There are three broad grammatical perspectives: first, second, and third person. A directed shift from one to a different perspective therefore has six possible routes.
FromTo
First personSecond person
First personThird person
Second personFirst person
Second personThird person
Third personFirst person
Third personSecond person
This table identifies the theoretical transitions. It does not imply that every transition is equally apt in any given context; rhetorical appropriateness depends on what the change accomplishes.