As we saw earlier, another use of links is to provide a link to content, such as a PDF file, that can be downloaded. In this way, you can provide value-added documents to your site visitor. The more useful content you can provide, the more the search engines will 'like' your site, and the more people will use it. With our site, the site owner might want to provide a printable catalog, or bonus material for people who buy one of his CDs.
In this activity, we will use some of the techniques that we learned earlier in the chapter, and create a link in our Node Content for the visitor to download a PDF file. We're going to use an image as the link.