The Android Clock app finally labeled the buttons at the top! I won't have to randomly press all of them until I get the right panel!
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IIRC, I've had labels there on my Galaxy S4 (currently running Android 5.0.1) for as long as I've had it.
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Replying to @nnethercote
Well, the Nexus 5X got them in an update to the Clock app that rolled out today. At least for me. Could be A/B tests.

Feb 15, 2017 · 6:20 AM UTC