1 Special Effect
To apply different types of the special effects to the background. Special Effects are like textures with some different set of effects. To preview different special effects, hover your mouse cursor on different special effects, and select the best suited special effect for the background.
2 Transparency
You can select the desired transparency level of the texture.
3 OK
Press OK button to apply the texture.
4 Cancel
Press Cancel button to drop the changes and close the dialog.