After more than two years I finally settled on what information is most important to display on my GPS main screen. Buying a HR monitor was an afterthought, but it has proven to be incredibly valuable. I just replaced my old HR strap with the Garmin Premium Heart Rate Strap and it is much improved.
Time and distance are important, but when I'm at altitude that is really important. And for rides like today, when it hit 102, that information is really important. Based on the temperature I decided it was not a good idea to attempt 50 miles. Note I'm so slow I don't even display speed.
The Edge 800 has a nice screen capture feature. I'd be curious to know what others consider most important to display. If you don't have a screen capture or photo you can just list them.
<p align="center"><img border="4" src="http://arnica.csustan.edu/mtbike/gps/GPS-Screens.jpg"><br>
Mtbr's 2016 Winter Biking GearReviews and Roundups
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Thread: Let's see your GPS screen