Michelle Haarhues shows how you can enable an enhanced scroll bar in SQL Server Management Studio:
There are so many tools within SQL Server Management Studio (SSMS) that can make your job as a DBA or Developer easier that you may or may not be using. One of the tools available is the customization of the Scroll Bar. You can change the display and the behavior of the scroll bars, which can make working with code a lot easier and more efficient, especially when working with long code. The two options we will discuss are Scroll Bar Display and Behavior.
I didn’t like this a lot at first, but as I used it a few times, it grew on me.