When reading barcodes with a camera, the camera’s adjustment and correction functions (focus, brightness, zoom) can be used to improve reading accuracy.
Focus adjustment
The focus distance can be manually set and fixed. The set focus distance is saved in the application and will be restored the next time the camera is launched.
To adjust the focus distance, press the 
(Focus) button to display the slider control.
Move the slider control knob to set the focus distance. The left side of the slider control is the close-up side, and setting it to the left end sets the auto focus mode.
Button display state: auto: When auto focus is set.
M: When manual focus is set.
Brightness adjustment
Brightness can be set and fixed manually. Brightness settings are saved in the application and will be restored the next time the camera is launched.
To adjust the brightness, press the 
(brightness) button to display the slider control.
Move the slider control knob to adjust the brightness. The left side of the slider control is the negative side and the right side is the positive side. The default value is 0.0 at the center.
Button display state: 0.0: Brightness compensation value
Zoom Adjustment
The zoom level can be manually set and fixed. The zoom level you set is saved in the application and will be restored the next time the camera is launched.
To adjust the zoom level, press the 
(Zoom) button to display the slider control.
Adjust the zoom level by moving the knob on the slider control. The left end of the slider control is the minimum level (equal magnification) and the right end is the maximum level. The default is equal magnification.
*If your camera does not support the adjustment function, the adjustment button for the unsupported function will not be displayed.