The height of the seat can be adjusted to fit your personal preference and what feels best for you. What feels good for most people is setting the seat so the handles are at about lower to mid-chest height.
Turn to one side and grab one handle, then turn to the other side to grab the other handle. Bring them together so you’re starting with the handles in front of you.
Stick your chest out and pull your shoulders back. This will help get a better stretch across the pecs, and target the pecs instead of letting the shoulders take over.
Bend your elbows as you control the handles back.
When you reach a point where you feel a stretch across your chest, reverse the motion. Focus on pushing the elbows together as you bring the handles together. This will help squeeze and contract the chest.