Komatsu PC138USLC Operation & Maintenance Manual page 114

OPERATION OPERATION
On the screen for Items 1) and 2), it is possible to carry out the
following operations with switches F2 to F6.
F2: Resets all adjusted values to default value
F3: Indicator of selected item moves 1 segment to left.
F4: Indicator of selected item moves 1 segment to right.
F5: Returns to user menu.
F6: Accepts change and switches to next item setting.
DETAILED CONTROLS AND GAUGES DETAILED CONTROLS AND GAUGES
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