diff --git a/gerrit-gwtui/src/main/java/com/google/gerrit/client/change/ReplyBox.java b/gerrit-gwtui/src/main/java/com/google/gerrit/client/change/ReplyBox.java
index 133d3036e3..2366e59d6d 100644
--- a/gerrit-gwtui/src/main/java/com/google/gerrit/client/change/ReplyBox.java
+++ b/gerrit-gwtui/src/main/java/com/google/gerrit/client/change/ReplyBox.java
@@ -76,7 +76,7 @@ import java.util.List;
 import java.util.Set;
 import java.util.TreeSet;
 
-class ReplyBox extends Composite {
+public class ReplyBox extends Composite {
   interface Binder extends UiBinder<HTMLPanel, ReplyBox> {}
   private static final Binder uiBinder = GWT.create(Binder.class);
 
@@ -228,7 +228,7 @@ class ReplyBox extends Composite {
   void replyTo(MessageInfo msg) {
     if (msg.message() != null) {
       String t = message.getText();
-      String m = quote(msg);
+      String m = quote(removePatchSetHeaderLine(msg.message()));
       if (t == null || t.isEmpty()) {
         t = m;
       } else if (t.endsWith("\n\n")) {
@@ -238,20 +238,25 @@ class ReplyBox extends Composite {
       } else {
         t += "\n\n" + m;
       }
-      message.setText(t + "\n\n");
+      message.setText(t);
     }
   }
 
-  private static String quote(MessageInfo msg) {
-    String m = msg.message().trim();
-    if (m.startsWith("Patch Set ")) {
-      int i = m.indexOf('\n');
+  private static String removePatchSetHeaderLine(String msg) {
+    msg = msg.trim();
+    if (msg.startsWith("Patch Set ")) {
+      int i = msg.indexOf('\n');
       if (i > 0) {
-        m = m.substring(i + 1).trim();
+        msg = msg.substring(i + 1).trim();
       }
     }
+    return msg;
+  }
+
+  public static String quote(String msg) {
+    msg = msg.trim();
     StringBuilder quotedMsg = new StringBuilder();
-    for (String line : m.split("\\n")) {
+    for (String line : msg.split("\\n")) {
       line = line.trim();
       while (line.length() > 67) {
         int i = line.lastIndexOf(' ', 67);
@@ -267,7 +272,8 @@ class ReplyBox extends Composite {
       }
       quotedMsg.append(" > ").append(line).append("\n");
     }
-    return quotedMsg.toString().substring(0, quotedMsg.length() - 1); // remove last '\n'
+    quotedMsg.append("\n");
+    return quotedMsg.toString();
   }
 
   private void hide() {
diff --git a/gerrit-gwtui/src/main/java/com/google/gerrit/client/diff/DraftBox.java b/gerrit-gwtui/src/main/java/com/google/gerrit/client/diff/DraftBox.java
index 46c37edb9e..86d149ac43 100644
--- a/gerrit-gwtui/src/main/java/com/google/gerrit/client/diff/DraftBox.java
+++ b/gerrit-gwtui/src/main/java/com/google/gerrit/client/diff/DraftBox.java
@@ -192,7 +192,7 @@ class DraftBox extends CommentBox {
     setRangeHighlight(edit);
     if (edit) {
       String msg = comment.message() != null
-          ? comment.message().trim()
+          ? comment.message()
           : "";
       editArea.setValue(msg);
       cancel.setVisible(!isNew());
diff --git a/gerrit-gwtui/src/main/java/com/google/gerrit/client/diff/PublishedBox.java b/gerrit-gwtui/src/main/java/com/google/gerrit/client/diff/PublishedBox.java
index 48b4c3c68a..f5bcaa6dfd 100644
--- a/gerrit-gwtui/src/main/java/com/google/gerrit/client/diff/PublishedBox.java
+++ b/gerrit-gwtui/src/main/java/com/google/gerrit/client/diff/PublishedBox.java
@@ -18,6 +18,7 @@ import com.google.gerrit.client.AvatarImage;
 import com.google.gerrit.client.Dispatcher;
 import com.google.gerrit.client.FormatUtil;
 import com.google.gerrit.client.Gerrit;
+import com.google.gerrit.client.change.ReplyBox;
 import com.google.gerrit.client.changes.CommentApi;
 import com.google.gerrit.client.changes.CommentInfo;
 import com.google.gerrit.client.changes.Util;
@@ -143,17 +144,21 @@ class PublishedBox extends CommentBox {
     replyBox.setEdit(true);
   }
 
-  void addReplyBox() {
+  void addReplyBox(boolean quote) {
+    CommentInfo commentReply = CommentInfo.createReply(comment);
+    if (quote) {
+      commentReply.message(ReplyBox.quote(comment.message()));
+    }
     getCommentManager().addDraftBox(
       getCm().side(),
-      CommentInfo.createReply(comment)).setEdit(true);
+      commentReply).setEdit(true);
   }
 
   void doReply() {
     if (!Gerrit.isSignedIn()) {
       Gerrit.doSignIn(getCommentManager().getSideBySide().getToken());
     } else if (replyBox == null) {
-      addReplyBox();
+      addReplyBox(false);
     } else {
       openReplyBox();
     }
@@ -165,6 +170,15 @@ class PublishedBox extends CommentBox {
     doReply();
   }
 
+  @UiHandler("quote")
+  void onQuote(ClickEvent e) {
+    e.stopPropagation();
+    if (!Gerrit.isSignedIn()) {
+      Gerrit.doSignIn(getCommentManager().getSideBySide().getToken());
+    }
+    addReplyBox(true);
+  }
+
   @UiHandler("done")
   void onReplyDone(ClickEvent e) {
     e.stopPropagation();
diff --git a/gerrit-gwtui/src/main/java/com/google/gerrit/client/diff/PublishedBox.ui.xml b/gerrit-gwtui/src/main/java/com/google/gerrit/client/diff/PublishedBox.ui.xml
index 46b76cad89..cbea847ab3 100644
--- a/gerrit-gwtui/src/main/java/com/google/gerrit/client/diff/PublishedBox.ui.xml
+++ b/gerrit-gwtui/src/main/java/com/google/gerrit/client/diff/PublishedBox.ui.xml
@@ -61,6 +61,11 @@ limitations under the License.
           <ui:attribute name='title'/>
           <div><ui:msg>Reply</ui:msg></div>
         </g:Button>
+        <g:Button ui:field='quote' styleName=''
+            title='Reply to this comment with quoting it'>
+          <ui:attribute name='title'/>
+          <div><ui:msg>Quote</ui:msg></div>
+        </g:Button>
         <g:Button ui:field='done' styleName=''
             title='Reply "Done" to this comment'>
           <ui:attribute name='title'/>