In photoshop and photoshop express, are used within editing programs to stack multiple pictures or objects on top of each other. this gives the designer more flexibility and greater control when editing the image or animation.

Layers are used to have different pictures on top of each other.

In Photoshop and Photoshop Express, Layers are used within editing programs to stack multiple pictures or objects on top of each other. This gives the designer more flexibility and greater control when editing the image or animation.

Monophony.  hope this ! : )