Copy Face   

		The Copy Face tool is used to copy an individual face of a solid if you do not want to copy the entire solid.  To use the Copy Face tool, click on the icon and select the faces you want to copy. You will then be asked to Specify a Base Point or Displacement.  This will be the reference point for the faces you want to copy.  In the image to the right, the top of the ramp and the left face are being copied, and the cursor is the base point that is used for this copy.
		Next, you will need to select the Second Point of Displacement, which is the point you are copying to.  AutoCAD is using that first reference point you selected and pasting the selected faces to this new point.
		You can see how the two Base Points line up once the copy is finished