How do I adjust the recline positions of the car seat base?
Adjust the base to one of three recline positions: remove the wedge cushion for position 1 (least reclined), attach it marked '2' facing up for position 2, and '3' for position 3. Ensure level line on side of base is parallel with ground or use rolled towels under base if needed.
From the official Graco Triogrow Snugloc manual, page 29
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