Facing-In (Narrow Seat): Recommended for smaller babies (8–15 lbs) who cannot yet hold their head up.
Facing-In (Wide Seat): Suitable for larger babies and toddlers to provide an ergonomic "M" leg position.
Facing-Out: Can be used once the baby has "rock-solid" head and neck control; always use the narrow seat setting for this position.
Back Carry (Backpack): Suitable for older babies who can sit up completely unaided, typically around 6 months or older.