We currently migrating a project from UDK to UE4, and noticed that the top viewport is displayed differently in each engine. The coordinate system is the same, but UDK has Y running left to right, vs UE4 which has X running left to right. Below are screenshots showing this, using the same model as a test. It’s not a problem once we figured out what was going on, we can just tilt our heads 90* every so often until we finish rebuilding. But I was curious if there was a specific reason for the change? Is it possible to create custom orthographic viewports for the sake of preference?
On a similar note, it is (or will it be) possible to change the coordinate system to right-handed? This is also just out of curiosity, as I know it would make some folks very happy. 
