HTML and CSS Reference
USING GRAPHIC APPLICATIONS TO MODIFY IMAGE FILE SIZE
When discussing an image's size, two dif erent meanings are used:
h e size of the i le in terms of its dimensions
h e number of bytes it takes up
Usually, in this discussion the context should make it clear which sense of size is being used,
but for the most part, the term size refers to the number of bytes in a i le, and dimensions
refers to the size of the image on the screen.
Adobe Photoshop is a commonly used application for making adjustments to graphic size and
quality. Further, Photoshop provides visual information that designers and developers can use
to decide how much byte reduction the graphic can take before its appearance suf ers. Figures
9-5 and 9-9 show this process. (Figures 9-6 through 9-8 show information about the i les and
how they appear on a Web page.)
Figure 9-5: Image and size information display in four-way view.