1, IKEA stool hook, sit in the office chair and find the adjusting handle.

2. Pull the handle, lean back slightly, and loosen the handle for a fixed angle; If you want to adjust it back, continue to pull the handle and use a little force on your back, and the chair will bounce back.

3. The backrest is flat, and there is a pull rod under the right armrest.

4. Swing back and forth. There is a thick black cylinder in front of the chair clothesline. You can adjust the swing range by turning left and right.