A feature that is often used when Athletics are on tv. It shows a a lap time, while maintaining the stop watch action at the same time. T2 is for a second time zone. and CHMis possibly CHIME (as in alarm or beep on the hour)
Also asked, what is t2 on a watch?
TIME 2. Watch can display time in a second time zone. Press MODE repeatedly until T2 appears.
Similarly, what does TR mean on a watch? Countdown Timer
Then, what does ALM mean on a watch?
Alarm (ALM)ALM. Displays alarm ON/OFF. Displays date.
How do I reset my digital watch?
Use the "Start/Stop" and "Split/Reset" buttons to set your digital watch to the correct hour and minute increments. Press "Mode" to display the "Date" setting screen. Use the "Stop/Start" and "Split/Reset" buttons to set the correct day and month. Press the "Adjust" button to save your "Time and Date" settings.