1 of 1 people found this helpful
i think it's not possible to set the zoom step explicitly.
But there are many ways to zoom and the steps seem to be different.
For example if you do this settings:
-Expedition Pan and Zoom
You can control the zoom by rolling the Middle Mouse's button.
The Steps seem not to be that big.
Well, I zoom with a mouse scroll and I'd like to set it a bit finer ("slower"), I think the current zoom step is too large.