To set a specific shell for a request, a developer creates a link to a server resource and adds a shell parameter to the link. The shell parameter value should be an alias to the target shell.

For example, the URL for a link to the public folder with the extranet shell is /folder.public?shell=shell.extranet. When users follow the link, they view the public folder framed with the specified extranet shell. When users click another link from the public folder page, they return to whatever shell they were using before, provided the link does not also have a shell parameter.