--- a/d_sample_display.rc	Sun Apr 02 13:48:09 1995 +0200
+++ b/d_sample_display.rc	Fri May 19 06:03:53 1995 +0200
@@ -136,4 +136,10 @@
  * try 'Display visualType' to see what X thinks.
  *"
 "/ Display hasColors:false
+
+"*
+ * uncomment to force black&white operation
+ * (makes sense on 4-plane servers)
+ *"
+"/ Display hasGreyscales:false
 !