Navigating with the camera while looking through it...how???

I was wondering how to navigate with the camera while looking through it, sometimes when i try that the view jump back to user-view instead of staying in the camera-view.
I don’t mean splitting the screen and then moving the camera using the translate tools in another view while looking through the camera in the first view, no i mean really navigating with the camera while looking through it without using a second view.

shift + F…

Or just select it, go to camera view and start moving around. Constrain on the Z axis (twice?) to dolly the camera back and forth.

Press ‘r’ twice for trackball rotation, too.

Thanks guys, that did the trick.

view navigation menu ,maybe fly around option