1. First, press the "Menu" key on the display panel to enter the menu interface.
2. Use the up and down arrow keys to select the Brightness/Contrast option, and then press the Enter key.
3. Use the left and right arrow keys to adjust the brightness and contrast, and press the "OK" button to save the settings after the adjustment.
4. If you need to adjust the language settings, you can select the "Language" option to adjust.
5. After the adjustment is completed, press the "Exit" key to return to the previous menu, or press the "Shutdown" key to close the display board. Jiangnan Jiajie generally refers to Jiangnan Jiajie Elevator Co., Ltd. Suzhou Jiangnan Jiajie Elevator Co., Ltd. (formerly known as Suzhou Jiangnan Elevator Factory Co., Ltd.) was founded in 1992. SJEC is a listed company with high-tech elevators, escalators and moving sidewalks.