Save a picture for web use in Photoshop
How to save a picture for web use in Photoshop This shows how to create "slices" of saved image in Photoshop to use as a web image. Using slices enables large pictures to load on web pages faster because the picture gets loaded as many smaller pictures. It goes step by step through how to set the file type and size, adjust preferences, and save multiple images in formats usable for the web.