How can I effectively target my chest muscles using the seated pec deck machine?

To effectively target your chest muscles using the seated pec deck machine, adjust the seat height and hand position to align with your chest level. Sit with your back against the pad, grip the handles, and push them together in front of you while keeping your elbows slightly bent. Focus on squeezing your chest muscles as you bring the handles together. Control the movement and avoid using momentum to maximize the effectiveness of the exercise.