An additional layer that magnifies part of the illustration. It's a common technique used for backgrounds in character art. 

There are sometimes small, primarily 2D variations, such as:

* The layer being reversed.
* The layer being rotated.
* The layer being partially transparent, in greyscale, or having other changes in color.
* A character having a different expression.

If the layer is from a different 3D perspective, or there are larger 3D differences such as costumes, poses, or characters, it's a [[projected inset]] instead.

For the "zoom layer" effect used on [[stage]]s by projecting the performance on background [[screen]]s, use [[screen zoom]] instead.

h4. See also

* [[Tag group:Backgrounds]]
* [[Tag group:Image composition]]