Compositing in 3D Space with Action > About Surfaces > Adding Drop Shadows >

# Shadow Menu Settings

Red Shadow field
  Displays the red shadow value. Editable.

Green Shadow field
  Displays the green shadow value. Editable.

Blue Shadow field
  Displays the blue shadow value. Editable.

Shadow colour Pot
  Displays the colour of the shadow. Editable.

Shadow Transparency Lock button
  Locks a shadow's transparency to the transparency of its parent surface.

Shadow Transparency field
  Displays the transparency level of the drop shadow. Editable.

Shadow button
  Toggles the shadow on or off.