Update _form.html.erb

app/views/vehicles/_form.html.erb

@@ -42,6 +42,19 @@
           Notes: 
           <div class="input">
             <%= f.text_area :notes, :rows => 6, :class => 'wiki-edit', :accesskey => accesskey(:edit), :cols => 60%>
+            
+          <p>  
+            <%= link_to_function content_tag(:span, l(:button_edit), :class => 'icon icon-edit'), '$(this).hide(); $("#issue_description_and_toolbar").show()' unless @vehicle.new_record? %>
+            <%= content_tag 'span', :id => "issue_description_and_toolbar", :style => (@issue.new_record? ? nil : 'display:none') do %>
+            <%= f.text_area :notes,
+                    :cols => 60,
+                   :rows => 10,
+                   :accesskey => accesskey(:edit),
+                   :class => 'wiki-edit',
+                   :no_label => true %>
+        
+            </p>
+            <%= wikitoolbar_for 'issue_description' %>
           </div>
         </div>