Unfortunately I don't have a mouse with a scroll wheel and the multiple fingers on the touchpad does not work. I have the Logitech Marble Ball. But after consideration, I decided to buy soon a new mouse of the same brand with scroll wheel. My old mouse needs to be replaced anyway. The mouse emulator would be an option but I find that too cumbersome, also because I use other applications I fear that this will give conflicts. But thanks for your advice and answer.  ;)

Cheers!
GM

I would absolutely love an option to use a key or two to toggle though the different items currently found by scrolling and especially a way to disable the middle mouse scroll entirely.  I use a magic mouse and sometimes when I click it also scrolls one or two items.  Totally understand if it isn't going to happen though, it's a niche issue that could be solved with a different mouse.