When using maps online, I find that the Magic Mouse scrolling is oversensitive. It's hard to point or click with the Magic Mouse without scrolling so far I lose where I was on a map.
Scrolling with the Magic Mouse in documents or text pages on the web works fine.
You can switch Magic Mouse scrolling off and back on in System Settings > Accessibility > Pointer Control > Mouse Options > Use mouse for scrolling, but that's so deep in System Settings that I doubt a string of mouse clicks would work.
Any suggestions?
I too want to do something similar and haven't been able to. In theory you could use a command line command, but it doesn't appear to take effect without a restart.
But you could get as far as Accessibility with Keyboard Maestro and the View Menu. You can tab down to each sub category, but then Return doesn't equal a mouse click. Again, this seems like a long chain of KM items.