Display subtitles in omniverse scenes

I want to create a blackboard or screen in the scene, and then display subtitles in real time. Is there any case or document that I can refer to? Thank you.

No we do not support any realtime overlays to the rtx rendering viewport. If you want to make actual 3D text in the viewport and then change the wording of that text dynamically with python script, that is fine. That is considered real 3D text that can be rendered.