It is not possible to insert a shadow behind the image. Depending on the type of shadow, you may get the results that you are looking for by inserting a solid box behind the image and offset it from the image.

To overlap an image over a box:

  1. Launch the program.
  2. Open the project you wish to work with.
  3. Go to the Insert menu and select the Graphic option.
  4. Browse to the location of the image and insert it.
  5. Go to the Insert menu and select the Shape option.
  6. On the Insert Shape window, select the Box option and click the OK button.
  7. Re-size the shape to match the dimensions of the image from step 4.
  8. Move the shape to where it is slightly offset from the image.
  9. Go to the Arrange menu and select the Send Backward option.