Request:

Would love to see a preview feature in the editor so I know what "real" content will look like while I'm developing themes.

Here's a use case and rationale:

1. I set a motion/video as the slide background in my theme editor.
2. I add and format text elements, but I'm not sure if I've got the element transparency set opaque enough that the motion behind doesn't obscure the text. I'd like to see that motion in action with some dummy text (even the placeholder "song text line one" or "title style" or "subtitle style" text).
3. In a perfect world, there would be a preview button to click so I didn't have to save and close the theme editor and then go into a schedule and apply it and go live just to see if it worked.