Camera rotation (noob question)

sorry for asking,

I’d like the camera to be in the positive x-axis, facing the y-z plane, so how to set the camera’s rotation to be so?

At the same time, anothe camera is in the negative z-axis, facing the x-y plane, what is the camera’s rotation values now?

For the first case, I think you’ll want a -90-degree rotation about the Y axis. For the second case, the rotation would be identity.

Ok, thanks.