Windows and Unix users can go back one frame by positioning your cursor inside the frame and clicking the right mouse button. A pop-up menu will appear. Choose "Back in Frame", and the frame will fill with the information that last appeared in that frame. Repeating the process will step you back through everything you viewed in that frame in reverse order. Macintosh users, position your cursor inside the frame that originally displayed the information you're seeking and hold down the mouse button to get the pop-up menu.
It's also possible that you'll start out in a frame and follow a link to a window designed without frames. In this case, the frames you've been seeing will disappear. Now, pressing the Back button will lead you back to the last framed page.