Changes your default device and directory specifications. Format SET DEFAULT_DIRECTORY [device-name[:][directory-spec]
1 – Parameters
device-name[:] Specifies a device name to be used as the default device in a file specification. directory-spec Specifies a directory name to be used as the default directory in a file specification. A directory name must be enclosed in brackets. Use the minus sign to specify the next higher directory from the current default directory. You must specify either the device-name parameter or the directory-spec parameter. If you specify only the device name, the current directory is the default for the directory-spec parameter. If you specify only the directory name, the current device is the default for the device-name parameter. You can use a logical name, but it must constitute at least the device part of the specification.