How should a beginner sit at the piano correctly?

According to instruction captured in a piano lesson transcript, the correct seating position at the piano involves several key points:

• Sit in the middle of the piano, aligned with the name on the instrument.
• Sit up tall with shoulders back and lean slightly forward.
• Sit on the edge of the bench, not deep into it.
• Your knees should not go far under the piano — if they do, the bench is too close and needs to be moved back.
• To check arm position, do a relaxed "karate pose" and touch the piano lid — there should be a nice bend in the arm.
• Keep shoulders relaxed throughout.