A Drop shadow is a copy of a graphic that is shaded black or another colour or given a shaded pattern. When dropped slightly to the left or right behind the original shape, it looks like a shadow.
 
Drop shadows are used to add dimension and emphasis to graphics.

1. Draw the graphic, then fill the graphic with colour (use the Element menu - Fill command).
2. Copy the graphic while it is still selected.
3. Give the copied graphic a different darker shading and Send it to the back using the Element menu (Arrange command).