Here is a list of ways to manage the power settings of your laptop:
Access the Control Panel by searching the Start Menu or clicking the shortcut.
In the Control Panel go to Hardware and Sound and then click Power Options.
Once in the Power Options you are able to edit the available power plans, navigate to the appropriate plan and click on Change Plan Settings.
Adjust the Plan Settings with the available options for the selected plan (adjust brightness, display timeout, waiver etc.).
Once all changes have been made, click the Save Changes button and the new settings will be applied.