I accidentally deleted the preview button from the Finder window. Firstly, this is not the same as this thread: http://forums.macrumors.com/showthread.php?t=538219 I still have Preview. It works fine when I click on it in the dock. What happened was: I was following the instructions to install Audacity. It said to "Option-drag the whole of the .dmg contents (not the .dmg itself) into the "Audacity" folder you created." I couldn't quite figure out how to do this -- select all and drag them all together -- so I was trying out different combinations of option click drag, command option drag, etc. Finally I get something to drag, it goes "poof" (yeah, that cloud of smoke), and.... I realize that something I pressed highlighted or activated the preview button and that's what I dragged, and it's no longer at the top of the Finder window. It's not in the Audacity folder I dragged it to, and it's not in the trash. How can I restore the preview button? (I'm on an aluminum MacBook running OS X 10.5.6. And, by the way, I'm totally new to Mac. I've only had my MacBook for just over a week.) Edit: I figured it out! First, technically what I was referring to was the Quick Look buttton (did I mention I'm totally new to Mac?), and I figured out that that was part of the toolbar, how to customize the toolbar, and restore the button. Phew!