Dynamic Input in the Sketch environment provides a Heads-Up Display (HUD) command interface near the cursor to help you keep your focus in the sketching area. Dynamic Input is active for the most commonly used sketch commands.
When Dynamic Input is on, value input fields near the cursor display information that is dynamically updated as the cursor moves. When a Line, Circle, Arc, Rectangle, or Point sketch command is active, the value input fields provide a place for user entry.
The ability to automatically place persistent dimensions can be disabled by clicking Persistent Dimension on the Format panel of the Sketch tab.
Benefit:
Less steps needed while using everyday functionality.
Video link: http://www.screencast.com/t/ZjMwZDE3M2Mt Created by one of the Cad Geeks
