2D-3D view
Switch 2D/3D view
When you are working on a Compo that contains 3D elements, you can choose to preview the 3D view of your objects in the Viewport , allowing you to move around in the 3D space, or the 2D view from a specific viewpoint (choose this viewpoint by creating a Camera in your Compo, or selecting an existing camera as ‘Current Camera’).
To switch between the 2D and 3D view, click the button with a blue (2D) and a yellow (3D) square, on top of the Viewport :