There is some documentation on this here:
The answer does depends on which type of Nest thermostat you have.
Nest Learning Thermostat 3rd gen
Nest Thermostat E
Also just for clarification what do you mean "at a set range"? Do you mean a set temperature?
I have the same question. I keep looking for the user guide, but the two page welcome pdf was useless and searching for temperature hold only takes me to an old Nest thermostat. I’ve tried the manual schedule and it doesn’t seem to hold the settings.