I have made some photo shot this morning...but i dunno how to post it here... or let me just explain here more...
about the heart rate:
after u enter exercise mode, the watch will detect heart rate and gps signal, but it will not display any heart rate value after the signal is detected... the heart rate value will be displayed only after u start the workout, until the it is finished.
about the data field:
the watch has pre-set seven data views, each set has three field displays.
the first view contain heart rate, pace and distance; the second view contain pace, distance and time... since i only want to know heart rate, pace, distance and time in my workout, so i would say it is enough for me as i only need to scroll up and down to get all i want.