The view area of the Dope Sheet displays keys hierarchically along the vertical axis. It displays time along the horizontal axis as cells or blocks.
Animated attributes are bounded by solid lines to indicate their extents. The colors of the blocks define the placement of an attribute or group of attributes within the hierarchy of the Dope Sheet.
Editing ranges of time and keys with the Dope Sheet Manipulator
See Copy, cut, paste, scale, move, or mute a range of time and keys with the Dope Sheet Manipulator.
The Dope Sheet pop-up menu bar
  -clicking
            anywhere in the view area causes a pop-up menu containing the Dope
            Sheet menu bar items to appear.
 -clicking
            anywhere in the view area causes a pop-up menu containing the Dope
            Sheet menu bar items to appear. 
         
Select Tool, Move Tool, and Scale Tool
In addition to the Dope Sheet tools in the toolbar, the Select Tool, Move Tool, and Scale Tool also are used to manipulate keys in the view area of the Dope Sheet. Because of the hierarchical nature of the Dope Sheet outliner, you can edit groups of attributes by type. This lets you perform powerful timing editing on large numbers of objects at once. See Select Tool, Move Keys Tool, and Scale Keys Tool.
You can scroll the graph
            view of the Dope Sheet horizontally by
            holding down the   (Linux
            and Windows) or
  (Linux
            and Windows) or   (Mac
            OS X) key on the keyboard and
  (Mac
            OS X) key on the keyboard and   -dragging.
 -dragging.
         
To scale the graph view
            uniformly, hold down the   or
  or   key
            and drag or
  key
            and drag or   -drag
            the cursor.
 -drag
            the cursor.
         
To scale the graph view
            along either the horizontal or vertical axis, hold down the   or
  or   and
  and   key,
            and
  key,
            and   -drag
            the cursor horizontally or vertically.
 -drag
            the cursor horizontally or vertically.