Display size?

Hey, I'm making a game that will have a display of 1000 by 1000 pixels.
However, when I use Preview, it's stretched out. I go to Attributes in Game and says that the Display Size is 1280 by 720 pixels. But I can't change them! How do I do it?
However, when I use Preview, it's stretched out. I go to Attributes in Game and says that the Display Size is 1280 by 720 pixels. But I can't change them! How do I do it?
Comments
you can have your game be larger inside, but you're window into the game is stuck to the original dimentions.