# MonoGame ortho projection axis direction

I have perfect square screen and I want to capture everything between -1000.0f and 1000.0f, so I create projection matrix like that:

var proj = Matrix.CreateOrthographicOffCenter(left: -width,
right: width,
bottom: -height,
top: height,
zNearPlane: -1.0f,
zFarPlane: 1.0f);


I expect the axes to be X - left >>> right and Y down >>> up, but if I project some points with Vector2.Transform I get following:

(-1000, -1000) is (-1, -1)
(1000, 1000) is (1, 1)


I expect -1 on Y axis to be the top of the screen, but it is actually the bottom. How so? Is there some convention I missed?