Preview display text at design-time

A useful feature would be to show the display text when setting it's location on-screen. So when you click the button and preview the scene in order to set the location point in which to display the text, you're able to see exactly how the text will look.
This would be similar to the preview of the character when setting way points.

You mean for narration & object text yes? Display text & action text is displayed above their owners (characters) heads or at the right hand side of the mouse cursor unless the position is forced with Lua script.

I do indeed mean all non-character text

Well I suppose it's an interesting idea. I guess you'll just have to see what the devs think about it.

P.S: I wasn't quite correct in regards to what I said about positioning the action text. I forgot about the bounding box option in the main game tab.