Press Windows Key + P to open Display Switch
You can also create desktop shortcut with following steps.
Right click on a desktop
Click New
Click Shortcut
Use any of the following commands depending upon your requirement
Opens Display Switch
%windir%\System32\DisplaySwitch.exe
Second Screen Only
%windir%\System32\DisplaySwitch.exe /external
PC Screen Only
%windir%\System32\DisplaySwitch.exe /internal
Duplicate
%windir%\System32\DisplaySwitch.exe /clone
Extend
%windir%\System32\DisplaySwitch.exe /extend
Click Next
Type name for shortcut and click Finish.
