Bosch GLM 30 Consignes D'utilisation/De Sécurité page 15

Press button 4 to exit addition/subtraction.
In Area and Volume Measurement Modes, calculate area/volume
measurement first and then press button 3 or 6. Calculate the
second area/volume measurement and press button 3 or 6 again
to get the sum.
Changing the Unit of Measure
Switching the Sound On and Off
The sound is switched on by default.
To switch the sound back on, use button 3 and 6 to adjust the
sound preference. Sound On will display when the sound has
been turned on.
Display Illumination
The display illumination is continuously switched on. When no
button is pressed, the display illumination is dimmed after approx.
10 seconds to preserve the batteries. When no button is pressed
for approx. 30 seconds, the display illumination goes out.
Press button 6 to add measured values or press
button 3 to subtract measured values. The result
will be shown at the bottom of the display after
"=", and the current measured value will be shown
above it.
Press and hold the function button 4 until the
image shown to the left is displayed. Use button
3 and button 6 to cycle through the units of
measurement. Once the desired unit of
measurement is displayed, press the
measurement button 2 to return to measuring.
Press and hold the function button until you see
the "Changing the Unit of Measure" display.
Press the function button 4 again to see the
image displayed to the left. Use button 3 and 6 to
adjust the sound preference. Sound OFF will
display when the sound has been turned off.
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