Editing Drop Shadow or Inner Shadow Effects in Photoshop

If you used the default settings to apply your drop shadow or inner shadow and now want to do some tweaking, feel free to edit at will by following these steps:
1. Double-click the layer thumbnail or the layer style icon (florin).
The Layer Style dialog box opens.
2. Change the Blend Mode setting to adjust how the colors of the shadow mix with the colors of your elements.
Usually the default mode of Multiply works best.
3. Adjust the Opacity setting to change how transparent the shadow appears.
4. Choose a shadow color by clicking the swatch to go to the Color Picker.
5. Establish the angle of your light source.
6. Select the Use Global Light option to ensure that all the shadows and highlights of all your elements are consistent.
You don’t want one layer to look like it’s 6 a.m., and another to look like it’s 2 p.m. The neat thing is that if you change the angle on one layer style, all the styles you’ve applied to your layers adjust to that new angle dynamically.
7. Specify how far the shadow is offset from your element with the Distance setting.
8. Adjust the Spread or Choke and Size settings to specify the boundary, intensity, and size of the shadow.
9. Select the Layer Knocks Out Drop Shadow option if you have a transparent object on top of the shadow.
This prevents the shadow from showing through the object.
10. When you’ve refined your effect settings, click OK.
Your effect is edited and ready to go. You can also choose to apply various contours and noise to your shadow.