How do I change the plane of the map?

How do i change the plane of the map? I’ve seen instructional videos where the host rotates the plane so that you can see the map on a horizontal view rather than from directly above. I’ve tried pretty much everything I can think of on my PC keyboard, but I can’t seem to locate this function. It’d make it a lot easier to understand some of the levels where there are a lot of stairs or elevators.

All I have to do is right-click

Oh. My. God. Thank you so much!

I wasn’t able to find this on any source. This’ll make life so much easier.

No problem =)