How do you adjust display brightness on Sharp EL-1197PIII?

To adjust the display brightness on a Sharp EL-1197PIII calculator, you typically need to press the "Shift" key followed by the "Brightness" key, which is often indicated by a sun icon. Use the "+" and "-" keys to increase or decrease the brightness level to your preference. If this does not work, refer to the user manual for specific instructions related to your model.