This video show how to use Direct Distance Entry in AutoCAD.
I have shown in previous tutorials how to enter points using a combination of Absolute, Relative and Polar coordinates. I hope that you have learned these techniques and will remember them.
This video shows you how to use a quicker method of enter a distance in AutoCAD. I didn't show this shortcut at first as the other methods are very important concepts to learn.
It is also important that you don't pick up any bad habits while learning these basics. Always make sure that you are either using Polar Tracking or Ortho Mode when using DDE.