Whether you are creating help topics for distribution with a program, or on the Web, the documents you author are created using a special formatting language known as Hypertext Markup Language (HTML). HTML topic files have a .htm or .html file name extension.
Although each help topic or Web page you author appears to be a document with text, graphics, or animated images on it, .htm files are actually text documents that have special HTML formatting codes. These codes, called tags, tell a browser how to display each page. Only the text that appears in a topic or Web page is actually in the .htm file. Any graphics, sounds, animated images, or other elements that appear are separate files that your HTML file points to. The browser copies or downloads the graphics, sounds, or other elements when it sees the tags telling it to do so.
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