In Power Options, you are able to choose when to turn off display, add Hibernate to the Power Options Menu and complete other power settings. As for how to open it, this article illustrates three commonly-used methods.
Video guide on how to open Power Options in Windows 10:
Way 1: Open Power Options from Quick Access Menu.
Press Windows+X to show the menu, and choose Power Options on it.
Way 2: Open Power Options via search.
Type power op in the search box on taskbar, and select Power Options in the results.
Way 3: Open Power Options in Control Panel.
Step 1: Access Control Panel.
Step 2: Click System and Security.
Step 3: Tap Power Options.