In such cases, the Message Bar appears, yellow or red, with a shield icon, to alert you about potential problems. Or, you may have a read-only file that you ready to edit and need to enable editing. The Message Bar displays security alerts when there is potentially unsafe active content (such as macros, ActiveX controls, data connections and so on) in the file that you want to open. Excel 2013 Word 2013 PowerPoint 2013 Excel 2010 Word 2010 PowerPoint 2010 Project 2010 Project Standard 2010 Excel 2007 Excel Starter 2010 More.