Enable Microsoft Office Developer Ribbon/Tab

To show the Developer ribbon/tab for MS Office 2010 Word, Excel, Outlook, & PowerPoint

1. Start the Office application
   
2. Click on File tab -> "Options"
   
3. In the categories pane, click "Customize Ribbon"
   
4. In the list of main tabs, check "Developer" and "OK."
   

To show the Developer ribbon/tab for MS Office 2007 Word, Excel, & PowerPoint

1. Start the Office application
   
2. Click on Microsoft Office Button (top left corner)
   
3. Click on "Word Options," "Excel Options," or "PowerPoint Options"
   
4. In the categories pane, default page or "Popular"
   
5. Check "Show Developer tab in the Ribbon" and "OK"
   

To show the Developer tab for Outlook 2007

1. Start Outlook
   
2. On the menu bar, click on "Tools" -> "Options"
   
3. In the "Options" dialog box, click on "Other" tab; under "General" options click on "Advanced Options"
   
4. In "Advanced Options" dialog box, check "Show Developer tab in the Ribbon" and "OK.