When viewing a lesson as a teacher, the collapsed and expanded tabs off the edit tab do not exist. I like the collapsed view in 1.8 which is what appears when I select the edit tab. I do most of my creation in this view.
I could not find an equal to the expanded view. Expanded allowed me to see all the content areas of my lesson via a scrollbar. Then stop and correct it. The current alternative is to preview the slide (one of two ways), then select the edit page button next to update lesson settings.