// Disable shape fill in case we want to get shadow of text.
ashp.getFillFormat().setFillType(FillType.NoFill);
// Add outer shadow and set all necessary parameters
OuterShadow shadow = new OuterShadow();
ashp.getEffectFormat().setOuterShadowEffect(shadow);
shadow.setBlurRadius(4.0);
shadow.setDirection(45);
shadow.setDistance(3);
shadow.setRectangleAlign(RectangleAlignment.TopLeft);
shadow.getShadowColor().setPresetColor(PresetColor.Black);
// Write the presentation to disk
pres.save("data/AsposeTextShadow.pptx", SaveFormat.Pptx);
System.out.println("Done");
}