Hello @SunsetRunner and welcome to the Help forums. I checked out the Backdated clock face in the Fitbit App Gallery. Many clock faces describe the features of the face. This one doesn't have any description. Generally speaking, you scroll through options by tapping on the clock face. If tapping doesn't do anything, then it looks like heart rate is your only choice.
Laurie | Maryland
Sense 2, Luxe, Aria 2 | iOS | Mac OS
Take a look at the Fitbit help site for further assistance and information.
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