This is a custom extension to the Unity Timeline package. I added two major features to support the dialogue system in the game "Rotund: A Well-Rounded Gentleman". This extension supports playback of custom dialogue rendered with TextMeshPro, pausing playback at the end of each line of dialogue is another custom feature for this extension. With my custom features, it becomes very hands-on and intuitive to develop dialogue scenes in this game.
Unity Timeline Dialogue System demonstration