diff --git a/public/stylesheets/style.css b/public/stylesheets/style.css
index aa020fc761..450984612e 100644
--- a/public/stylesheets/style.css
+++ b/public/stylesheets/style.css
@@ -572,6 +572,7 @@ img.unread {
 .preview {
     padding: 0.5em;
     font-size: 15px;
+    min-height: 200px;
 }
 .preview p > img {
     display: block;
@@ -786,6 +787,11 @@ textarea.editor {
     height: 400px;
 }
 
+#edit_reply_form .preview,
+#create_topic_form .preview {
+    min-height: 400px;
+}
+
 #submit_btn {
   margin-top: 10px;
 }
diff --git a/views/reply/reply.html b/views/reply/reply.html
index 5061fda4a9..9e1c2e7de2 100644
--- a/views/reply/reply.html
+++ b/views/reply/reply.html
@@ -49,16 +49,16 @@
               id="reply2_editor_<%- reply._id %>" name='r2_content' rows='4'></textarea>
             <div class='editor_buttons'>
               <button class='btn action_preview'>预览</button>
-              <button class='btn reply2_submit_btn'
+              <button class='btn reply2_submit_btn btn-primary'
                 type="submit" data-id='<%= reply._id %>'>回复</button>
             </div>
           </div>
           <div class='markdown_in_preview'>
             <div class='preview'></div>
             <div class='editor_buttons'>
-              <button class='btn reply2_submit_btn'
-                type="submit" data-id='<%= reply._id %>'>回复</button>
               <button class='btn action_modify'>修改</button>
+              <button class='btn reply2_submit_btn btn-primary'
+                type="submit" data-id='<%= reply._id %>'>回复</button>
             </div>
           </div>
         </div>
diff --git a/views/topic/index.html b/views/topic/index.html
index 2828ee2eac..977dafc265 100644
--- a/views/topic/index.html
+++ b/views/topic/index.html
@@ -143,14 +143,14 @@
             <textarea class='editor' name='r_content' rows='8'></textarea>
             <div class='editor_buttons'>
               <button class='btn action_preview'>预览</button>
-              <button class='btn btn-primary' type="submit">提交</button>
+              <button class='btn btn-primary' type="submit">回复</button>
             </div>
           </div>
           <div class='markdown_in_preview'>
             <div class='preview'></div>
             <div class='editor_buttons'>
               <button class='btn action_modify'>修改</button>
-              <button class='btn btn-primary' type="submit">提交</button>
+              <button class='btn btn-primary' type="submit">回复</button>
             </div>
           </div>
         </div>