There are several effects for pictures available in Nero CoverDesigner.  
Color Adjustment effect: 
Brightness
Opens the Brightness window with before and after views of the picture. Move the Brightness slider left or right to darken or lighten the picture. 
Contrast
Opens the Contrast window with before and after views of the picture. Move the Contrast slider left or right to increase or decrease the contrast of the picture. 
Gamma
Opens the Gamma window with before and after views of the picture. Move the Gamma slider left or right to darken or lighten the midtones of the picture. 
Equalizer
Applies the Equalize effect to a picture. This effect distributes the brightness values of the colors uniformly.
This effect is appropriate for adjusting a picture that is too light or dark. It is also useful for making objects in the shadows more visible. 
Filter effect: 
Emboss
Creates an embossed version of the picture.  
Erode
Generates a watercolor version of the picture, making the picture softer and coarser.  
Mosaic
Opens the Mosaic window with before and after views of the picture. Move the Mosaic slider to the right to make the picture coarser, creating a mosaic effect.  
Outline
Draws the edges of the surfaces in the picture, generating an outline effect.  
Parabolic > Convex
Generates a convex view. 
Parabolic > Concave
Generates a concave view. 
Posterize
Opens the Posterize window with before and after views of the picture. Move the Posterize slider right or left to create an oil painting effect.  
Sharpen
Opens the Sharpen window with before and after views of the picture. Move the Sharpness slider to the right to make the picture sharper and harder.  
Solarize
Opens the Solarize window with before and after views of the picture. Move the Solarize slider to the left to strengthen the lighting effect. Move the slider completely to the left to invert the values and create a negative. 
Soften
Opens the Soften window with before and after views of the picture. Move the Soften slider to the right to make the picture softer and less focused. In doing so, areas are merged together.
Flip effect: 
Horizontal
Flips the image horizontally, making it appear as the mirror image.  
Vertical
Flips the image vertically, the image appears upside down.  
Negative
Creates a negative of the image.  
Pinch
Opens the Pinch window with before and after views of the picture. Move the Pinch slider right or left to pinch or bloat the picture from the center. 
Swirl
Opens the Swirl window with before and after views of the image. Move the Swirl slider right or left to swirl the image to the right or left.  
Rotate
Opens the Rotate window with before and after views of the image. Move the Rotate slider to the right to rotate the image 90°, 180° or 270°.   
 


Image Effects