The Camera Type options change the view mode in the Geometry View.
Choose Camera type
From the Camera Type drop-down choose a camera from these available options—Active Camera, Perspective, or Orthographic.
The Active Camera option changes the view mode to display what is seen in the frame of the current active camera. This is the camera that is active in the Real-Time View as well. This allows you to adjust the camera just as you would in the Real-time View.
The Perspective option changes the view mode to display a perspective view of the entire scene.
The Orthographic option changes the view mode to display an orthographic view of the entire scene.
Selecting Perspective or Orthographic will unlink the Real-time View from the Geometry View allowing you to control the two views independently of each other. However, you will still see the real-time movement and position of the active camera.
Controlling the Active camera
When you use the Perspective or Orthographic camera inside the Geometry View, you can control the Active Camera of the Real-Time View. As the camera is moved in the Geometry View, the Real-time View and camera properties in the Project window update as well. The active camera is highlighted in red, while any other cameras in the scene are gray. You can switch to a camera by clicking it. If a camera is locked, you will need to right-click and select Unlock Camera to unlock the camera prior to moving it
The Active Camera can be manipulated with a move tool inside the Geometry View. This features makes positioning cameras in interiors much easier.
Move Active Camera Position
This changes the actual position of the camera. With the camera unlocked, right-click in the Geometry View and select Move Active Camera Position. Use the Move Tool to change the position.
Show: Toggle the visibility of the Translation and Rotation handles.
Keep View Direction: When Keep View Direction is on, the translation will move the camera parallel to the field of view, and not pivot the camera target which is the default behavior.
Axis: Select Local or Global axis as the base of the Translation. Note that Rotation can only be done based on the Local scale.
Move Active Camera Target
This changes the ‘look at’ point of the camera. With the camera unlocked, right-click in the Geometry View and select Move Active Camera Target. The Move Tool will appear on the Camera Target. Use the Move Tool to change the position.
Keep View Direction: When Keep View Direction is on, the translation will move both the camera and camera target, and not pivot the camera which is the default behavior.
Saving Active Camera Changes
Any changes you have made to a camera are still unsaved and will be reset if you switch camera.
Right-click and select Save Camera to update the current camera position or target, or select Add Camera to create a new camera. The new camera will appear in the Project window, Camera tab where the camera changes may be saved or added as well.