Scroll Bars

  On DECwindows, you can use scroll bars to move through a buffer without
  having to type commands or press defined keys.

  To use the vertical scroll bar:

      /\     Click M1 on the stepping arrow to scroll up one line,
      --     or press and hold M1 for continuous scrolling.
     |  |
     |  |    Click M1 above the thumb to view the previous screen,
     |  |    or press and hold M1 for continuous scrolling.
     |  |
     |==|    Drag the thumb to scroll to that relative position.
     |==|
     |  |    Click M1 below the thumb to view the next screen,
     |  |    or press and hold M1 for continuous scrolling.
     |  |
     |__|    Click M1 on the stepping arrow to scroll down one line,
      \/     press and hold M1 for continuous scrolling.

  Similarly, use the horizontal scroll bar to shift the window left and
  right, typically to view very wide text:

        __________________________________________
      /|               [__]                       |\
      \|_________________________________________ |/

  For example, clicking M1 to right of the thumb in the horizontal scroll
  bar shifts the window to the right.

  Related topics:

     Mouse        Position Cursor    NEXT SCREEN    PREVIOUS SCREEN
     SET WIDTH    SHIFT LEFT         SHIFT RIGHT