Ah. That makes it a lot easier to understand. But they do have the "Go Back" button there to prevent such an issue. I know that hitting the back button is a habit, but eventually you will get into the habit of hitting the given "Go Back" button instead. Also, if you are worried that you might hit the wrong back button, then select all your text, and than Copy it before you hit preview, that way you can just Paste it back in.
using the "go back" button yields the same results as using the browsers' back button.