The Web Layer is shared across all frames. Slicing A common method of creating navigation bars or navigation graphics for websites is to create a graphic and then cut it into pieces which are then reassembled on a webpage using an HTML table. The graphic appears seamless in the browser even though it is actually made up of multiple pieces, each a separate graphic file. If a portion of the graphic is updated frequently, such as the date, a single piece may be replaced rather than the entire graphic. Parts of a graphic can be optimized individually, resulting in smaller file size and better image quality.
Slices can designate part of an image as the target, or event area, for behaviors.
For example, use a slice to mark an area that is swapped with another image when a hotspot is triggered. Use the Slice tool to draw rectangular slice objects. When a slice object is drawn, slice guides appear, indicating how the image will be sliced into multiple files when exported. Slice guides are automatically created when slice objects are drawn. Each slice is exported as a separate graphic file.