Hi neuralynx,
Do you mean that you’d like to change the timeout that occurs if you leave the CP open on your browser? Or you’d like to make sure your CP users don’t have to login again if they close the CP and then come back to the computer hours later? I’ll try to answer both just to be sure.
The timeout value, the amount of time that the CP can be on a browser screen before it counts down and logs itself out, can be changed by adding the cp_session_ttl value to your config.php file. It’s set to 3600 (the number of seconds in an hour) by default.
If your Control Panel Session Type is set to Cookies Only, the CP login screen will present an option to auto-login users on future visits.
Does that help answer your question?