To customize the mouse behavior in the scroll bar, do one of the following:
You can scroll through all of the target's memory in a Memory View window, or in the source pane when only assembly code is displayed. In such cases, the scrollbar will be in infinite scrolling mode. See Chapter 18, "Memory view window" and "Assembly code view" for more information.
When the scrollbar is in infinite scrolling mode, the thumb is replaced by a diamond. The thumb is fixed in the center of the scroll bar and cannot be dragged. To scroll through memory, you may use the scroll arrows to scroll one line at a time, or click above or below the thumb to scroll one page at a time.