This was a problem everywhere in Windows. But I admit that I noticed the problem most in RRT3. Not that I spend a lot of time in RRT3...
![Laughing :lol:](./images/smilies/icon_lol.gif)
The mouse I bought was the Microsoft Comfort 4500: a traditionalist, big'n'chunky object, but with fancy Lazzzrrr-assisted tracking. The scroll wheel has continuous rather than notched movement - but I think I'm getting used to that.
Anyway, to the problem and the solution. At first I just used the default Plug'n'Pray standard USB mouse driver that Windows (7 64-bit) automatically installed. Horrors! Zooming in and out in RRT3 using the mouse wheel was hopeless, no matter how much I adjusted RRT's settings. Sometimes it would zoom, sometimes not.
This was a terrible result, as I'd spent £££ on this mouse specifically to make me more productive in my work... err....
![Wink ;-)](./images/smilies/icon_wink.gif)
![Embarassed :oops:](./images/smilies/icon_redface.gif)
The answer turned out to be remarkably simple. I downloaded the full Microsoft drivers. Apparently this mouse (and perhaps other modern mice) sends less than one line's movement at a time through the scroll-wheel. Perhaps this makes for more precise or smoother scrolling in applications which support it.
In a remarkably good bit of driver design, you can specify specific applications (so, in this case, RRT3.exe) that don't like this behaviour. The driver then reverts to the "traditional" signal from the wheel, just for these applications. Problem solved!
![Very Happy :-D](./images/smilies/icon_biggrin.gif)
Hope this helps other people as well!