Using the Slider

  The slider is the rectangle in the scroll bar.  The slider shows
  you how much information is still hidden.  For example, if
  the slider takes up 10 percent of the scrolling region, only 10
  percent of the information appears in the window.  The other

  90 percent remains hidden.

  To move quickly through the information, move the pointer
  to the slider.  Press MB1, and drag the slider up and down
  through the scrolling region.  When you release MB1, the
  information from the position in the information indicated by
  the slider is displayed in the window.

  Additional topics:

  *   Using Menus and Controls

  *   Overview of Paint