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A help command is provided.

  cl > help pros  will give an overview of useful help tasks and
files in the  PROS/XRAY packages.

  cl > help package-name will give one line of explanation for each
of its tasks or packages.

  cl > help task-name will give detailed information about that task.
This is also the best way to find the package in which a task resides.

The following commands are useful for package management:

  cl > ?              # Lists tasks and subpackages of the current package
  cl > ??               # Lists all tasks and subpackages currently loaded
  cl > bye    # Unloads the current package, returning to the previous one