Embedding Content
Now it might be me but I like poking things.

In Cloud+, you have Share > Download > Presentation (off-line use).
I tried it and you get a single HTML file with your presentation all wrapped neatly in Base-64 encoding.

So what?

Well, if you use Shift+Ctrl+Alt+A and attach the file to your design you can then create a Placeholder to display it.

So what?

Well, the Embed a Widget code with the Path adjusted to relative is:
Code:
<iframe src="index_htm_files/Presentation Test.html#xl_xr_page_title" width="100%" height="100%" frameborder="0" scrolling="auto" name="xara_iframe" ><p>Your browser does not support iframes.</p></iframe>
So now you can scale a presentation so you have a "live preview" of say 200px wide or start at a specified slide.
@Xara+: Can you make the Next/Previous Page buttons scale to match the presentation's size?

I can now render a thumb's click to open a larger presentation in another Placeholder or a separate Tab.

Acorn