LAP TIME MEASUREMENT: (ie more than one runner on a track)
In Normal Display mode, Press (C) to activate stopwatch mode.
Press (B) to start timer, and then press (D) to show the first runner's
time. (The timer continues counting). Press (D) to release lap time
display and return to the timer. Repeat this process for all runners.
Once all runners have finished, press (D) to reset the timer to zero.
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