Bosch GLL 55 Operating/Safety Instructions Manual page 20

On/Off switch 2 in position
" "
Press button for horizontal
line operating mode 6 once
Press button for vertical line
operating mode 5 once
Press button for vertical line
operating mode 5 once and
horizontal line operating
mode 6 once
If the measuring tool is outside of the self-leveling range, the laser
lines will flash quickly.
If during work with automatic leveling you switch to the "working with-
out automatic leveling" mode (On/Off switch 2 in position "
first combination of this mode's lines is always activated.
The laser lines flash slowly in the "working without automatic leveling"
mode.
If during work without automatic leveling you switch to the "working
with automatic leveling" mode (On/Off switch 2 in position "
the first combination of this mode's indicators is always activated.
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Working with Automatic Leveling
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Cross-line
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Working without Automatic Leveling
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