2.2.3 The Function of Plummet, Laser and Conpensation
1. Press Laser key to display electronic bubble
2. Press F1 to display tilt value
3. Press F2 to open laser direction, and press F2 again to turn off laser direction.
4. Press F3 to open laser plummet screen. You can adjust the brightness of plummet from 1 to 10. The higer the value, the brighter the laser plummet.