Each title’s name is the same as the video file you add in. If you want your DVD has all different title as you like, I’m afraid the only thing to do is rename your input file name. The menu edit function only could rename the whole DVD name, menu background music and picture.
Another, if you want the menu of each title has a clip, you can set the time of the clip under “Tools”->”Preferences”->”Menu Setting”, input the “Seconds” how long you want.