Let me add to what D said--we envisioned most dialogs/popups/popovers as being over a screen, so that's why we primarily support them as a layer over the current state.  

If you specifically want to support new windows, that can get interesting, depending on platforms you're targeting. For instance, a Web browser new window would limit you in what you can show (and these days most folks eschew actual windows in favor of HTML-based overlays in the same window.  Silverlight and, I think, Flash would be similar, at least in browser. And of course most of the current mobile tablet/phone platforms don't like literal windows either.  But if you're working on desktop platforms specifically, that might be the more common case for literal new windows.  We could add something like partial transparency for them, but we couldn't promise it would work on your target platform, of course.

So all that is a long way to say, if you want literal new windows, suggest that on UserVoice. If you want just dialogs/popovers/popups in the same window, use a Container Box for that.  

I have it in my list of blog posts to post a simple how to for this, as well. So keep an eye out if ya want. :)

Hi Francis,

Currently there’s no way to include a screen into another screen. What you can do is to add a new state and draw your dialog on top of the previous content for instance using a Container Box to keep the dialog content together. Also, you can make half transparent by using the Transparency slider included in every control property window.

You can suggest new product ideas for future versions (or vote for existing ones) in our user voice website: indigostudio.uservoice.com

We’re glad you are enjoying your experience with Indigo Studio.

Regards

Diego