Is there a feature that can turn subtitles on and off, like a real movie? I want subtitles in my movie, like closed captioning that can be turned on or off.
DVD Architect Pro can do subtitles, yes. There's a whole section on subtitles in the manual / online help. In brief, navigate into the movie so that you can see its timeline, click the Insert Subtitle Track button, and then click the Insert Subtitle Text Event button to add a piece of subtitle text. (These buttons are on the toolbar immediately above the timeline. In newer versions of DVD Architect, the Insert Subtitle Track button is part of a dropdown button with a yellow plus sign on it.)
If you are using DVD Architect Studio, that cannot do subtitles.