Reappear blogger navigation bar

 This will help you to reappear your navigation bar.

1. Log in to blogger account  Design  >> Edit HTML, 
    "Expand Widget Templates" checked.

2. Find these tag  by using Ctrl+F      
                                                       ]]></b:skin>

3. Paste below code before  above tag

#navbar-iframe {
  height:5px;
  }

/* IE7, IE8, IE6 */
  #navbar-iframe { height/*\**/: 30px\9; }


#navbar-iframe:hover {
  height:40px; !important; 
  }

4.Now click preview and save template. You are done.