When in edit mode the game goes too high rez and then I packed it and ran by itself and it still does it, anyway to slow it down?
Take a look at the scalability settings https://docs.unrealengine/latest/INT/Engine/Rendering/Scalability/ScalabilityReference/index.html 
When you question is how you can change the screen resolution -> https://docs.unrealengine/latest/INT/Search/index.html?x=0&y=0&q=change+screen+resolution 