Hi Mike,
I am so sorry to send you a messsage again because I think that I miss some information to tell you. I try to follow your method but when I right click I cannot find the tab for “Apply Formatting to Selected tracks”. Right now I put all the Chinese and English subtitles in Vegas editing software not DVD Architect. So any method to change the subtitles in one time rather than one by one in vegas editing software. Would you mind to tell me step by step? I try to find all tab and click all the icons and find nothing for this function. I feel so confused and panic because my deadline is approachiing. Thank you for your generous help.