Reference - Casio 3170 Manual

Reference

This section contains more detailed and technical information about watch operation.
It also contains important precautions and notes about the various features and
functions of this watch.
Auto return features
If you leave a screen with flashing digits for two or three minutes without performing
any operation, the watch automatically saves any settings you have made up to that
point and exits the setting screen.
Data and Setting Scrolling
The D button is used to scroll through setting screen data on the display. Holding
down this button during a scroll operation scrolls through the data at high speed.
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