Skil ME981901 Owner's Manual page 24

NOTE: Arrows
negative) is between 0.1 to 10 degrees at 0° and 90°. The height
and direction of the arrows
angle relative to 0° or 90°, depending on the value and direction of
the deviations from them. Follow the arrow icons to fine tune the
position of the tool to level or plumb. (FIG. 13)
Fig. 13
Fine Turn to Level
Relative Angle Measurement
Use the relative-angle measurement to measure the angle
difference between two working surfaces.
1. Turn on the tool. Press the UP Arrow Button or Down Arrow
Button to change the mode to digital leveling. The LCD screen
indicates the absolute angle between true level and the working
surface.
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occur only when the deviation (positive or
on the LCD screen vary with the
Fine Turn to Plumb