Auto zoom: Difference between "Automatic" and "Fixed"?

Hi there,
did not understand the exact difference between “automatic” and “fixed auto zoom” - and did not find an explanation in documentation or FAQ or forum (sorry, if I missed something).
I noticed, that, if I chose “fixed”, I can choose the “Auto zoom level”, and if I chose “automatic”, this is not the case.
But what does this mean for “automatic auto zoom” - which zoom factor does Kurviger use in this case?
Or did I misunderstand this option completely?

9 posts were merged into an existing topic: New auto zoom feature in Kurviger 1.1.18