Click "View" then "Customize"
Check the items you want to see.
There is no view button or I would have used it. When first opening the program I went to view and unchecked everything not knowing that I would be unable to get the tabs back. I was just checking to see what the view would be as I unchecked each item. Silly me. So, how do I get the view tab back when I open Windows Defragmenter?