GameMaker tutorial / lesson with completed project files at gameprogrammingcourse.com in the RESOURCES section.
Give each player their own screen or window in a two player game by splitting the screen. Each player will have a view that follows them around in the room. Great for two player adventure games. Recommend you watch How To Make View Screen Follow Player first as this video builds on it. Then watch DrawGUIwithViews to learn how to do extra drawing when using views.
Check out hundreds of other GameMaker tutorials and lessons at GameProgrammingCourse.com
All these gamemaker tutorials will work with Gamemaker Studio GMS or Gamemaker Studio 2 GMS.
Go to the Resource Page of http://www.gameprogrammingcourse.com to download the Project Files for these tutorials!