How to rotate object in After Effects without affecting other values?
The anchor point defines the "center" around which an object in AE moves, rotates etc. Often, when not taking care of initially setting the anchor point to the right location, rotating the object can lead to surprises. For simple position changes, you probably don't really care where the anchor point is set, once other Params get into play, this can lead to problems since effectively can look as if it affects position, in case of an object with transparency.