Thank you for your reply. As for the utility or usefulness of it, one scenario that I wish it were possible is the improvement of the following: I’m in a sandbox, I’m creating an instance of a concept, and every now and then I need to trigger the preview manually to generate a text that follows a PlantUml syntax, which the PlantUml plug-in parses and displays as UML diagram. In this scenario, the concept editor remains open, same with the screen containing the generated text, and the diagram screen. This is extremely useful in real-time discussion with Business Analysts while doing requirements gathering, where you use your DSL and the BA looks at the diagram. I’m done with this basic setup. The only challenge really is the auto-preview.
Now, that’s in a sandbox. I assume the behavior is the same once the language has been built and converted into a plug-in or created with stand-alone IDE. (I have not yet built a plug-in or a stand-alone IDE since I’m having some minor issues)