The Guides Layer is a special layer containing guide objects and guidelines which are used to align and position objects accurately. All objects on the guides layer are shown as dotted outlines and can be made magnetic to aid positioning. If a blend object is placed on the guides layer the intermediate objects are ignored. The guide layer is created automatically when you create a guideline and can be created manually using the Layer Gallery. The guides layer would normally be used to hold objects providing a framework to which objects in other layers are aligned. For more details, see Guidelines and Guide Objects Overview.