Default Camera: the Free Camera
Viewport Free Camera
The free camera exists only in its viewport and is deleted when the viewport is closed. If you have marked a camera as the favorite camera 1 for a product, that camera's settings will be used to initialize the viewport's free camera when the product is loaded.
The free camera's settings can be modified in the Cameras editor. They are also edited as you navigate in the viewport.
You can change the sensor used by the free camera by dragging and dropping a new sensor onto the viewport or onto the Sensor field in the Cameras editor.
Viewport Camera Presets
Each viewport has a series of camera presets: top, bottom, left, right, front and back views.
You can change the preset at any time. Right-click on the name of the active camera, which appears in the top left corner of the viewport. In the contextual menu that appears, select View, then choose the camera preset that you would like to activate.
It is not possible to modify these camera presets.