Johnson Level & Tool Mfg. 40-6001 - Manual (Page 26)

26 ©2013 Johnson Level & Tool - Rev. 3
Memory Recall
This instrument stores your last 20 measurements in order recognizing
their unit of measure and measuring mode.
Press and hold the button.
Press or buttons to scroll up or down through the recorded
measurements.
Memory Reset Feature
While the laser distance measure instrument is off, the memory may be
erased by following these steps:
Press and hold the button.
While holding press the power button .
Release as you see the screen turn on and them immediately off.
Press and release power button to power on the instrument.
Memory will be reset to zero.