| You can give objects on your slides the illusion of depth by adding shadows. PowerPoint provides several preset shadowing options, or you can create your own by specifying color, transparency, size, blur, angle, and distance (New!). You can change all these shadow options at the same time in the Format Shape dialog box. Instead of starting from scratch, you can select a preset shadow in the Format Shape dialog box, and then customize it. Add a Preset Shadow to a Shape 
 Click the shape you want to apply a new or different shape effect.
 Click the Format tab under Drawing Tools.
 Click the Shape Effects button, and then point to Shadow.
The current effect appears highlighted in the gallery.  Point to an effect.
A live preview (New!) of the style appears in the current shape.  Click the effect you want from the gallery to apply it to the selected shape.
 To remove the shadow, click the Shape Effects button, point to Shadow, and then click No Shadow.
Add a Custom Shadow to a Shape  
Click the shape you want to apply a new or different shape effect. Click the Format tab under Drawing Tools. Click the Shape Effects button, point to Shadow, and then click More Shadows. To customize a preset shadow, click the Presets button, and then select a starting shadow. Specify the following custom options: Color. Select the color of the shadow. Transparency. Drag the slider or enter a number from 0 (fully opaque) to 100 (fully transparent). Size. Drag the slider or enter a number from 1 to 200 to set the shadow size relative to the original shape. Blur. Drag the slider or enter a number from 0 (no blur) to 25 (full blur) points to set the radius of the blur. Angle. Drag the slider or enter a number from 0 to 359 degrees to set the angle the shadow is drawn. Distance. Drag the slider or enter a number from 0 (no blur) to 25 (full blur) points to set the distance the shadow is drawn.
All your changes are instantly applied to the shape. Click Close.
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