You can modify the camera view using the position controls.
To adjust the camera position:
Click the Scene button.
Click the Camera button.
Click the Modify tab.
From the Camera Position field, use the position controls to move the camera left/right, up/down, or back/forward.
The camera position adjustment here is a global modification, that is, it modifies all camera animation key with the same offset. If you want just modify the camera position of a specific key, go to that frame, turn Edit Key on then adjust camera view in the 3D preview window.