Two display orientations bothered me initially a lot. Landscape oriented presentations did not appear right on portrait oriented displays and vice versa. So I created 2 different ‘Demonstration Presentations’ for each display orientation. Still, it was not going to work, because we are allowed only one presentation and only one can be set to play across all the displays for the given company. What if we needed to change orientation at some point, right? Or what if company wanted both landscape and portrait oriented displays?
So the solution was plain and simple. I created one 1920px X 1920px presentation. Both types of orientation share common 1080px X 1080px left-top square of that presentation. So, I placed there the content that would be identical for both orientation modes. What I was left to redesign were two areas of 1080px X 840px at the bottom-left (for vertical) and top-right (for horizontal.
Now I have one perfect ‘Demonstration Presentation’ that is displayed correctly on both vertical and horizontal displays.
Example (scroll or zoom out for big picture): http://preview.risevision.com/Viewer.html?type=presentation&id=c906816d-b77b-48d6-8f9f-2a856004d...