I like using the tactical overlay because it makes ranges and movement so much easier to see, but frequently I wish I could tilt or change its angle on the fly. For example, if I warp into a combat site and the rats are at range but all “above” the plane made by the tactical overlay, I would like to shift the angle of the plane putting me and the rats all on the same “level”.
It’s space there really isn’t an “up” or “down”.
I guess you could rotate your monitor?
But I don’t think that’s what you mean. 
I agree there’s no up or down in space, but sadly for some game mechanics like this there is a horizontal plane. No way to tilt it.
Eve uses submarine physics with a space skin slapped on top of it.
It’s New Eden Space, there is.
The tactical plane is a fixed imaginary flat area in space around your ship, it isn’t something you can move or bend or manipulate, it exists in your ship’s A.I to give you the pilot more information about the space around you.
Tactical overlay is a reference plane with regards to your ship. Up and down, left and right, do exist in terms of your ship.
And no, you can’t tilt it.
True. However NASA uses Earth as a source for all their spacecraft to navigate. It could get even more “messy” using the systems in place at NASA. It is a fictional universe and the developer can just make shi… stuff up, to appease the Trekkies in the audience. Don’t make me hit you with a Heisenberg Compensator!
Fly safe o7
It seems it hasn’t occurred to you yet that a plane like you ask for could be mathematically impossible depending on the distribution of the objects?
What you are actually asking for is an artificially “dumbed down” view that ignores the Z dimension if the base plane would be in X/Y. Something like the new 2D mode of the map, but without loss of distance information.
But maybe you are also using it wrong? After activating tactical overlay you can additionally activate the tactical camera. And this enables you to turn the view, pan around and see the distance projection from above, all detached from your ship…
