How to view page thumbnails; a full page view all at once (including full vertical length)

I know there was a way that you could view each page in full size, at one time. So you did not need to scroll up and down - I also recall it did so in a miniature size (like page thumbnails). I want to be able to see each page in its full length. 

Does anyone recall how to do this. I do know, it was not in Pages menu, and it may not have even been in Design menu. Please let me know. It is a helpful thing when you have a small screen.

Thank you!

Hi,
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