It is really frustrating when I am trying to track heart rate and the screen keeps changing back to the time. Let me set the display so it stays on what I waS looking at last. Don't keep changing the display. This usability issues put my heart rate up even further on a bicycle hill climb when I was trying to monitor my max heart !!!! Similarly, when I am not exercising I want it to stay on the time, not floors??!! Thanks for listening.