Here is the pdf version of the watches manual:
http://www.sportline.com/manuals/900.pdf
Press the bottom metal sensor until the display flashes. Says its best to use the "flat pads" of your finer and not the tips.
Good luck.
RJ
RESETTING PEDOMETER DATA
1.
Reset Pedometer data by
PRESSING & HOLDING
the
RESET
key in Step, Distance (Mile or
Km), Calorie (Kcal), Speed or Timer modes