I can't figure out how to cut a section of the graph out. I was off my bike for about 2 min. at a rest area, and my HRM kept going. Is there a way to remove the "dead" spot in the graph? Also I have forgotten to turn it off at the end of a ride and left the watch on the bike.. using all 22 hrs of info! Can I remove the extra time at the end of the graph? thanks, steve