Six presets are available for both the cover shot and the open book. You will be asked if you want to apply the highlight position provided by the preset. This can be manually adjusted at a later step.
In addition to the camera position and rotation the ratio of focal length to camera distance can be controlled. If the distance increases, the focal length increases as well. The book fills the image always about the same.
However you have the option to zoom in and out.
The aperture controls the depth of field. Is the F-number increasing, the depth of field decreases. Image elements which are not in the focal plane, are blurred.
In order to adjust the focal plane best, it can be displayed in the editor view. The 2D representation of the focus adjustment can be seen as the top view on the open book.
With increasing inferiority of the lens chromatic aberrations and lens distortions are added.