My father changes the settings of cameras and the thermostat. He has found that through the header, in the three dots, there is a search bar where all the entities appear. I would like to be able to mark entities that can only be manipulated by the administrator, or at least have the ‘visible’ option affect this section.
He likes to play around, which is normal, but he leaves everything misconfigured.
Welcome to the community!
This is an often discussed feature request, please see and vote here:
A workaround would be to create a input boolean called admin or something.
Then set up an automation to trigger on all state changes on the entities you want to block access to and if input_boolean.admin is off (condition) then it uses the trigger.from_state to return the state to what it was.
And if he finds the boolean, you need to set up an alarm entity, this requires code to unlock 
Moved to Configuration > Frontend, as there already is a feature request to vote for such a thing, and maybe there is a workaround, like the one @Hellis81 suggested! 
