The two release angles: for a right-handed backhand the disc tilts left on a hyzer (towards your weak-hand side) and right on an anhyzer. That is how you throw curves instead of straight lines.
Hyzer and anhyzer are not throw types but angles — at release you simply tilt the plane of the disc. On a hyzer it leans towards your weak-hand side, so left for a right-handed backhand; on an anhyzer towards your strong side. Since nearly every disc hooks back towards the weak-hand side at the end of its flight anyway — that is its fade — a hyzer amplifies that finishing curve, while an anhyzer works against it and brings the disc back later. That is how you build lines around trees and mandos. The classic beginner mistake is confusing tilt with nose angle: tilt happens sideways, the nose points forward — release it nose-up and even the cleanest hyzer climbs, stalls and drops. One more thing gets overlooked: the angle only works if your arm speed matches the disc's speed — otherwise a fast disc fades out early, however cleanly you tilted it.