Please enable horizontal scroll
It's really easy to do in the settings with the presentation. This is important because quite a few people set their browser(s) to a specific size and have to resize the window to see the whole Web page(s) and then resize it back when they leave.
For what it's worth, I use 900x1024* (width x height) browser window, and using a wider presentation without scrolling requires I readjust my browser window and unless it's interesting enough to stay, which isn't often, I leave and don't come back.
You can simply solve this if you enable the horizontal scroll with the design settings which will make all visitors happy and want to stay longer and maybe return if your content is worth it. So, please do this for yourself and your Website.
--------------* - I use this size for a specific reason, which I learned from a former newspaper jounrnalist. It has to do with the normal non-peripheral vision where a person's eyes read something without having to change left or right, which is about 600 pixels wide.
So I keep the content within a 600 pixel widith within a 900 pixel width window for margins and borders. It doesn't pay to use a larger browser window with my Website because it will always display in the center within the 900x1024 size.
In addition, a 600 pixel width prints on a 8 1/2 x 11 inch paper without scaling or resizing. Just click print and go, and the Web pages look on paper as they do in the browser window.