Creating a Bird's Eye View Map

I myself am trying to do something similar. I’m trying to have a 2nd monitor act as a birds eye view of the level, and then I want to overlay some 2D shapes on top. So far I’ve put together that I can use a camera called SceneCapture2D to get the 2D birds eye view image:

And that I can use something like ProjectWorldToScreen to get pixel coordinates of stuff on screen incase you want to put a HUD icon over an actor on the screen or whatever:

I think the last bits of knowledge that I’m trying to piece together is how you go and create a 2nd monitor to display the birds eye view, and how to go and set the altitude of the SceneCapture2D so that it captures the whole level and nothing else.