diff --git a/4chan_x.user.js b/4chan_x.user.js
index d255a8686..7b2a0e26d 100644
--- a/4chan_x.user.js
+++ b/4chan_x.user.js
@@ -110,7 +110,8 @@
         'Report Button': [true, 'Add report buttons'],
         'Comment Expansion': [true, 'Expand too long comments'],
         'Thread Expansion': [true, 'View all replies'],
-        'Thread Navigation': [true, 'Navigate to previous / next thread']
+        'Index Navigation': [true, 'Navigate to previous / next thread'],
+        'Reply Navigation': [false, 'Navigate to top / bottom of thread']
       }
     },
     flavors: ['http://regex.info/exif.cgi?url=', 'http://iqdb.org/?url=', 'http://google.com/searchbyimage?image_url=', 'http://tineye.com/search?url=', '#http://saucenao.com/search.php?db=999&url='].join('\n'),
@@ -912,6 +913,14 @@
     },
     scroll: function(delta) {
       var i, rect, thread, top, _ref;
+      if (g.REPLY) {
+        if (delta === -1) {
+          window.scrollTo(0, 0);
+        } else {
+          window.scrollTo(0, d.body.scrollHeight);
+        }
+        return;
+      }
       _ref = nav.getThread(true), thread = _ref[0], i = _ref[1], rect = _ref[2];
       top = rect.top;
       if (!((delta === -1 && Math.ceil(top) < 0) || (delta === +1 && top > 1))) {
@@ -2597,13 +2606,16 @@
         if ($.config('Auto Watch') && $.config('Thread Watcher') && location.hash === '#watch' && $('img.favicon').src === Favicon.empty) {
           watcher.watch(null, g.THREAD_ID);
         }
+        if ($.config('Reply Navigation')) {
+          nav.init();
+        }
       } else {
+        if ($.config('Index Navigation')) {
+          nav.init();
+        }
         if ($.config('Thread Hiding')) {
           threadHiding.init();
         }
-        if ($.config('Thread Navigation')) {
-          nav.init();
-        }
         if ($.config('Thread Expansion')) {
           expandThread.init();
         }
diff --git a/script.coffee b/script.coffee
index 1eb049b31..17a2fb2eb 100644
--- a/script.coffee
+++ b/script.coffee
@@ -42,7 +42,8 @@ config =
       'Report Button':      [true,  'Add report buttons']
       'Comment Expansion':  [true,  'Expand too long comments']
       'Thread Expansion':   [true,  'View all replies']
-      'Thread Navigation':  [true,  'Navigate to previous / next thread']
+      'Index Navigation':   [true,  'Navigate to previous / next thread']
+      'Reply Navigation':   [false, 'Navigate to top / bottom of thread']
   flavors: [
     'http://regex.info/exif.cgi?url='
     'http://iqdb.org/?url='
@@ -675,6 +676,13 @@ nav =
     return null
 
   scroll: (delta) ->
+    if g.REPLY
+      if delta is -1
+        window.scrollTo 0,0
+      else
+        window.scrollTo 0, d.body.scrollHeight
+      return
+
     [thread, i, rect] = nav.getThread true
     {top} = rect
 
@@ -1972,13 +1980,16 @@ main =
         location.hash is '#watch' and $('img.favicon').src is Favicon.empty
           watcher.watch null, g.THREAD_ID
 
+      if $.config 'Reply Navigation'
+        nav.init()
+
     else #not reply
+      if $.config 'Index Navigation'
+        nav.init()
+
       if $.config 'Thread Hiding'
         threadHiding.init()
 
-      if $.config 'Thread Navigation'
-        nav.init()
-
       if $.config 'Thread Expansion'
         expandThread.init()