Dim, turn off and lock it after some time.GNOME Documentation Projectgnome-doc-list@gnome.orgNatalia Ruz Leivanruz@alumnos.inf.utfsm.cl Set brightness and lock your screen
To configure the Screen Settings and save power, go to System Settings and, from the Personal section, choose Screen.
In the Brightness section you can select the Screen Brightness level you prefer by sliding it using your mouse. To dim the screen, enable the option Dim the screen to save power in the same section.
You can choose a certain period to turn off your screen when there is no actidvity, to do this: look into the Brightness section and choose the amount of time you prefer in Turn off after. You can choose from 1 minute to 1 hour.
Turn ON the option Lock, for locking the screen after the period selected. You can change the period as well as the previous option.
GNOME Documentation Project
Explain how to change the length of time after which the screen is dimmed, and other similar options.