Optimize by File Size

It's not unusual to get a request for a Web graphic to be no larger than "x" kilobytes. Advertising banners, for example, are often restricted to a maximum file size. Luckily, the Save for Web command in the File menu can help with that; in the flyout menu to the right of the preset options in the Save for Web dialog, choose Optimize to File Size. Enter the size for your graphic, click OK, and Save for Web will do the rest.