The PRO L1 has three modes, M1, M2 and M3.
M1 - Continuous Scan Mode
This mode continually displays a yardage on screen as you move the laser. Once you have located your target the yardage will be displayed. This mode should be used in competition where slope technology is not permitted.
M2 - Golf Mode
This mode only displays a yardage once you have located your target and pressed to confirm your target. Once confirmed the laser will vibrate to confirm target lock. The display will provide the yardage to the target as the main reading, however below this will display the yardage with the slope and angle factored in.
M3 - Speed Mode
This mode only displays a yardage for a moving target.