Explain what guide layers are, when they are used, and how they are created.

What will be an ideal response?

A guide layer is a layer that contains a shape you can use to trace or align objects, or to create a motion path for an animated object. First, you create the shape or path on the guide layer, then you use it as a template for objects in the layers above it. Because a guide layer appears in the Timeline but is not visible in a published movie, it is an efficient design tool. For example, say you want to show the curved path a spaceship takes before entering faster-than-light speed. You could add the spaceship graphic to one layer. You could then draw and modify an oval shape on a guide layer and then use that layer as the motion path of the spaceship graphic. You can also import or copy a graphic to a layer and then convert it to a guide layer. To create a guide layer, right-click (Win) or [control]-click (Mac) a layer in the Timeline, then click Guide. A guide layer icon appears on the layer.