This sets the zoom speed when auto-rotating the view, in percent per second. Use a positive percentage to zoom in, or a negative percentage to zoom out. Automatic zoom can be useful for demos or when recording a video.
If you're making a video, you may want to know what auto-zoom percentage will reach a given scaling by the end of the video. The calculation is as follows:
AutoZoom = (exp(log(Scaling) / Duration)) - 1) * 100
For example to zoom by 5x (500%) over 30 seconds:
AutoZoom = (exp(log(5) / 30) - 1) * 100
AutoZoom = 5.5113