Index: class.doc
==================================================================
--- class.doc
+++ class.doc
@@ -300,11 +300,12 @@
 (Image <strings...>)
   Specify strings with the names of images. The first string is the
   name of the image numbered 0, next for the image numbered 1, etc.
 
 Input
-  Set the Input flag for this class.
+  Set the Input flag for this class. This causes it to receive a KEY
+  message during the input phase of each turn.
 
 Invisible
   Set the Invisible flag for this class.
 
 (Misc4 <numbers...>)