The following operations allow you to change the camera settings interactively with the mouse.
Camera | Move
Shortcut : V 
With this operation you can change the position of the camera. You can move the camera left, right, up and down. The view direction of the camera will not be changed by this operation
Camera | Move To/From
Shortcut : X 
This option allows you to move the forward and backwards along the view direction. When used with a '2D' or isometric camera, this doesn't do much visually, unless you move the camera far enough so some (parts) of the objects are behind the camera, in which case they disappear.
Camera | Inspect
Shortcut : C 
This option is only available for 3D cameras and allows you to inspect a scene by moving the camera around the focus point of the camera. If you click on an object when you start this operation, that object will get picked and the focal point of the camera will be set on that object. This allows you to quickly inspect an object from all sides.
Camera | Swivel
Shortcut : Alt+V 
This option is only available for 3D cameras and allows you to change the view direction of the camera. You can pan and tilt the camera in 4 directions
Camera | Select Camera
Shortcut : CTRL+P 
This option allows you to select a camera from a list of stored camera positions (presets), or store the current camera as a new camera preset. It also provides an option to delete stored presets.
Camera | Zoom
Shortcut : Z 
This option allows you to zoom in/out. In '3D' this will work the same as with a regular camera. In a '2D' or isometric camera this will change the scale of the objects.
Camera | Full View
Shortcut : Ctrl+7 
This option is will reposition and reconfigure the camera to get a view of the full scene.
Camera | Full View (all)
Shortcut : 
This option is will reposition and reconfigure the camera to get a view of the full scene in all viewports.
When something unexpected happens you can use the Camera Undo to undo the changes you made to the camera settings.
Camera | Undo
Shortcut : Ctrl+8 
This option undoes the last change made to the camera settings.
Camera | Redo
Shortcut : Ctrl+9 
This option redoes the last camera undo.