Each canvas plane can contain one or more image layers. An image layer is like a piece of transparent acetate that you can sketch on.

By sketching different elements on different image layers you can easily make changes to individual elements or re-arrange image layers to change their order. You can also duplicate image layers, merge image layers together, temporarily hide image layers, or permanently delete image layers.

Each canvas plane also contains a background layer. The background layer defines the background color for the canvas plane. You can only set the color of the background layer once when the canvas plane is created.

A canvas plane can also contain mask layers and invisibility mask layers. All of these types of layers can contain either paint, or shapes.