Like the Color Grading plugin, I really wish VEGAS would give us the option to toggle between Text Generated Media without having to click the Edit Generated Media icon each time.
Particularly in subtitling, this cumbersome workflow can be a hazard.
So to cut a long story short - say you have three texts and I open the edit button to one of them. The minute I click on the next one, the editing box should change accordingly to that.
This is my suggestion.