Check you mouse software some of them have the scroll button in the mouse. You locate your curser nexted to the text in word. Click down on the mouse wheel and then just move the curser outside the icon tht pops onto the page. Depending how far you move you up or down sets the speed. Often even with this feature you can use the scroll wheel over the side bar . However you're manually turning it.
If you're serious about making your own PDF files from word you could have a look at www.nonags.com I noticed that they had some .pdf makers there. They are free without crippleware from nonags and that would probably suit your needs better than the overbloated Adobe Acrobat if that's all you want to do with it.
Alex
