I can't find the Edit Button to toggle the Edit Toolbar in the Preview Application
Here's a screencap of a file that's open in editor:
On the support page Mac Basics: Preview app views and edits images and PDFs, there's an edit button like in the following picture:
However, I don't see that option anywhere.
Best Answer
It seems that was just an outdated version of preview. In the new version the button is called Markup and is in the same location.