|11 Deselect all selection by pressing Ctrl+D. Make "Copy of Raster 1" your active layer. Create a small rectangle selection around the feet area and click your mouse once anywhere on the image. This will make a selection on the feet area.
Add a shadow ( Effects > 3D Effects > Drop Shadow ).
My settings :
Vertical = 16 Horizontal = 5 Opacity = 56 Blur = 5 Color = Black