To some extent, a graphic designer can play a useful part in the conception of a site without the need to learn new tools. The basic appearance of a page can be worked out in Photoshop or other graphics software, for example, before being reconstructed as a functioning entity by Web designers. In practice, however, it will normally prove essential to take into account the precise possibilities and limitations of the medium before attempting to visualize the design. These possibilities and limitations will depend on the technologies chosen to drive the site, which in turn will be selected according to its purpose, nature, and target audience.