-functions to call, and other activities and operating modes. If you are
-running XEmacs under the X window system, a number of standard
-Xt command line arguments are available as well.
+functions to call, and other activities and operating modes. If you
+are running XEmacs under the X window system, a number of standard Xt
+command line arguments are available, as well as a few X parameters
+that are XEmacs-specific.
+
+ Options with long names with a single initial hyphen are also
+recognized with the GNU double initial hyphen syntax. (The reverse
+is not true.)