To adjust the seat height correctly: 1. Align Your Feet: Ensure your feet are flat on the ground or on a footrest. 2. Knees and Hips: Your knees should be at a 90-degree angle with your hips. 3. Elbow Position: Your elbows should be at the same height as the desk or work surface. 4. Back Support: Adjust the lumbar support to fit the curve of your lower back.