Hello @sam1961
Thanks for reaching out to our Nest Community. I apologize for all the inconvenience with the brightness on your Nest Thermostat. Don't worry; I'm happy to assist you with this feature.
If you have a Nest Learning Thermostat 3rd or 4th gen, you can go to this page to adjust your brightness: Change the Brightness on your Nest Learning Thermostat.
Feel free to keep us posting if you have more questions about your Nest Thermostat. We're happy to help.
Best regards,
Douglas.
