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Q&A

Q1:Which kinds of files compress better as GIF than as JPEG or PNG?
A1: Because GIF uses a limited palette, any picture that has only a few colors will give you a smaller file as a GIF than in the other formats. Such graphic items as titles in flat colors, logos, posterized photos, or line art will make very small GIFs. Full-color photos will not.
Q2:When should I use Save a Copy?
A2: Use Save a Copy when you want to make a copy of the picture you are working on and then continue to work on the original instead of the copy. Suppose that I have a picture called Roses, which I have worked on and saved. If I save a copy as Roses copy, and then keep working, I will still be working on the original Roses but will also have a copy of the picture in a closed file as it was before I did the additional work.
Q3:What file formats should I use for images I'll be putting in my Web page?
A3: You should try to stick with native Photoshop files when creating your images. This enables you to use all the powerful Photoshop 7 editing features, such as layers. When you've finished your image, save it as a GIF, JPEG, or PNG for use on the Web.
Q4:How does color depth affect image file size?
A4: Simply put, the more colors that are in your image, the larger the file size because it takes more bits to encode more colors.


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