Keyboard shortcut "Win+P". Press the Windows logo key + P on your keyboard. Select one of the options according to your needs.
Right click on an empty area of the desktop.
Choose Display Settings.
Scroll Down to the Multipledisplays area and select select Duplicate these displays or Extend these displays. Note: If you cannot see the additional monitor(s) listed, click Detect. If this does not work, try restarting your computer and do step 1 to 2 again.