diff --git a/docs/EXTENDING.txt b/docs/EXTENDING.txt
index 3cbbb0ba5..7f00e7d54 100644
--- a/docs/EXTENDING.txt
+++ b/docs/EXTENDING.txt
@@ -8,7 +8,7 @@
                            bill@newbreedsoftware.com
                             http://www.tuxpaint.org/
 
-                         June 14, 2002 - April 26, 2007
+                          June 14, 2002 - May 6, 2007
 
    --------------------------------------------------------------------------
 
@@ -376,16 +376,20 @@ Stamps
              of the following lines to the stamp's data file:
 
              "tinter=normal" (default)
-                     This is the normal tinting mode.
+                     This is the normal tinting mode. (Hue range is
+                     +/- 18 degrees, 27 replace.)
 
              "tinter=anyhue"
-                     This is ???.
+                     This remaps all hues in the stamp. (Hue range is
+                     +/- 180 degrees.)
 
              "tinter=narrow"
-                     This is ???.
+                     This like 'anyhue', but a narrower hue angle. (Hue range
+                     is +/- 6 degrees, 9 replace.)
 
              "tinter=vector"
-                     This is ???.
+                     This is map 'black through white' to 'black through
+                     destination'.
 
     Unalterable Stamps
 
diff --git a/docs/html/EXTENDING.html b/docs/html/EXTENDING.html
index 87d8030bc..f5cee893c 100644
--- a/docs/html/EXTENDING.html
+++ b/docs/html/EXTENDING.html
@@ -23,7 +23,7 @@ New Breed Software</p>
 <p><a href="mailto:bill@newbreedsoftware.com">bill@newbreedsoftware.com</a><br>
 <a href="http://www.tuxpaint.org/">http://www.tuxpaint.org/</a></p>
 
-<p>June 14, 2002 - April 26, 2007</p>
+<p>June 14, 2002 - May 6, 2007</p>
 </center>
 
 <hr size=2 noshade>
@@ -493,16 +493,20 @@ effect.</p>
 
 	  <dl>
 	  <dt>"<code><b>tinter=normal</b></code>" (default)</dt>
-	  <dd>This is the normal tinting mode.</dd>
+	  <dd>This is the normal tinting mode. (Hue range is
+            +/-&nbsp;18&nbsp;degrees, 27 replace.)</dd>
 
 	  <dt>"<code><b>tinter=anyhue</b></code>"</dt>
-	  <dd>This is ???.</dd>
+	  <dd>This remaps all hues in the stamp. (Hue range is
+            +/-&nbsp;180&nbsp;degrees.)</dd>
 
 	  <dt>"<code><b>tinter=narrow</b></code>"</dt>
-	  <dd>This is ???.</dd>
+	  <dd>This like 'anyhue', but a narrower hue angle.
+            (Hue range is +/-&nbsp;6&nbsp;degrees, 9 replace.)</dd>
 
 	  <dt>"<code><b>tinter=vector</b></code>"</dt>
-	  <dd>This is ???.</dd>
+	  <dd>This is map 'black through white' to
+            'black through destination'.</dd>
 	  </dl>
 
         </blockquote>