How to allow camera rotation when pointing at?
Hello, I am trying to create an animation where the camera is turing arond an object (not at the center of the scene). To be sure that the camera will always track this object, I used a constraint to make it pointing at this object. However, in some part of the animation, the camera is reversed, and the top appears at the bottom of the image, that is not at all what I want. So, I just would like to make the camera rotating on itself in order to turn the it right side up. But when I try to dial the rotation settings on the camera parameter pane, the rotation doesn't work because of the "point at" constraint. I don't understand why I could not rotate the camera: I mean, while the camera is still pointing at its target, it should be possible to make it rotating... I can translate it but not rotate it; is it possible to fix it, please?
I've been trying to do this animation for 3 days now, I think I will become crazy... 
Thank you in advance!


Comments
What you are looking for is orbit. Orbit will circle around, like the moon orbits the earth.
Try to look in Windows > Workspace > Customize to find the current keys to orbit, and use them (or change it to your liking).
If you aim to an object with a camera by using Point At, dialing Camera's Rotates in Parameters pane won't work.
You have to hold LeftMouseButton + Drag the View icon in the upper right corner of Viewport, or Ctrl + Alt + hold LeftMouseButton to drag in Viewport to orbit the view, so as to change the Camera's Transforms ~~