The Slice Select Tool selects, moves, and resizes slices:
In the Toolbox, select the Slice Select Tool and click on a slice to select it.
You can move and resize with the Slice
Select Tool bounding box of selected slice. To move a slice by a few
pixels you can use keyboard cursor keys.
Right-click on a slice to open the tool's context
menu. Via this menu you can access commands available for slices
in Photoshop. To access the rest of Slice commands you have to switch to ImageReady.
*See also an article about Slice Tool. **Web graphics issues are discussed in detail in the 2nd chapter of this video-course.