a transparent image that is not visible in the browser window, but is used to control spacing
a transparent image, used to control spacing that is not visible in the browser window
Dreamweaver is unlike word processing in that you can't insert blank spaces more than once by pressing the spacebar. To include blank space, you need to either import a blank graphic or use a spacer image.
A transparent image used for layout purposes, or a decorative image which is part of the appearance of the layout which has no real meaning or value. Spacer images should always have null alt text since they are unnecessary to understanding the purpose of a site.