Google itself doesn’t recommend this because it interferes with page scrolling, but if you want to use it, I’ve added it as a shortcode parameter for version 2.50.
You can enable it in the shortcode as:
[mappress scrollwheel="true"]
And the Leaflet version is:
[mappress scrollwheelzoom="true"]
How do i activate it in the backend – it’s a pain to manually click the zoom buttons when wanting to create a map quickly from within the post edit screen?