You can specify a virtual root, a directory other than
  the root, at which you want to start displaying the
  namespace.

  This is useful if you have interest in viewing only
  a particular directory in the namespace or you do
  not have read access to high-level directories in the
  namespace.

  To set a virtual root, choose Virtual Root from
  the Customize menu and a Virtual Root selection box
  appears. At the Selection prompt, enter the full name
  of the directory (including the namespace nickname, if
  necessary) that you want to be the virtual root.

  Once you have entered one or more virtual root names,
  subsequent displays of the Virtual Root selection
  box show an alphabetized list of the most recently
  specified names. The list always includes the root
  directory (/.:) of the default namespace. Double click on
  a directory name in the list to cause it to become the
  new virtual root or type it in at the Selection prompt.