Adjust Office Chair

The steps for adjusting the Ergonomic Chair E3 from Heibai Diao are as follows:

1. Seat Height Adjustment
Step away from the seat cushion and lift the cable control adjuster on one side of the cushion upwards to raise the seat; lift the same adjuster again to lower the seat. Ensure your body is off the seat during adjustment to prevent pressure from causing the adjustment to fail.

2. Backrest Recline Function
Pull the operating lever under the seat outward, and lean back to recline the backrest. To lock the recline angle, pull the lever out and adjust to a comfortable position; some models may require pushing or pulling the lever again to complete the locking. To return the backrest to its upright position, lean back first and then slowly sit up, and the backrest will automatically reset.

3. Footrest Function
Pull out the footrest to use it, and push it back in when not needed. Ensure the footrest is fully extended or retracted during operation to avoid jamming or accidental retraction.

4. Seat Depth Adjustment
Lift the front operating lever upwards, and the seat cushion can move forward or backward. Maintain a stable sitting posture during adjustment and adjust to a position where the thighs are comfortably in contact with the front edge of the cushion according to leg length.

5. Armrest Adjustment

• Height Adjustment: Press the button on the outer side of the armrest handle and lift or press the armrest to the desired height.
• Forward and Backward Adjustment: Hold the front end of the armrest and pull it forward or push it backward to adjust the position.
• Left and Right Adjustment: Move the armrest surface horizontally to achieve left and right adjustment.
• Rotation Adjustment: Push the armrest left or right to rotate it.
• Front-End Rotation Adjustment: Press the button on the inner side of the armrest and simultaneously flip the armrest surface upwards to adjust the front-end angle.

6. Lumbar Support Adjustment

• Height Adjustment: Hold the lumbar support and pull it up or down to adjust to a comfortable height for lumbar support.
• Forward and Backward Adjustment: Pull the lumbar support to the frontmost position to automatically unlock it, and then push it back to the initial position to readjust the forward and backward positions. The lumbar support has an automatic lumbar-tracking function that dynamically adjusts support according to lumbar movement.
• Folding Adjustment: The sides of the lumbar support can be folded inward to provide a more snug lumbar wrap.

7. Backrest Height Adjustment
Grasp both sides of the backrest and slide it up or down to adjust the backrest height, ensuring the scapulae are in contact with the backrest.

8. Headrest Adjustment

• Height Adjustment: Pull the headrest up or down by hand to adjust to a comfortable position for neck support.
• Forward and Backward Adjustment: Pull the headrest forward to adjust multiple forward and backward positions.
• Rotation Adjustment: Rotate the main shaft at the bottom of the headrest by掰动 (this word seems to be a non-standard or misspelled Chinese word, perhaps it means 'twisting' or 'turning', here translated as 'turning') it; hold both ends of the headrest surface and move it up or down to adjust the mesh angle.

Adjust according to your body type and sitting habits step by step to ensure all parts provide adequate support and avoid fatigue from prolonged use.