well some DVDs you can switch audio, subtitles on the fly. Some DVDs you have to go to menu and make your selections, and they usually have a Resume Movie thingy to click on and you go back to where you accessed the menus. Di$ney DVDs are notorious for doing that
.
------------------
Ah, the power of DVD
Anakin:"I've decided to come and rescue you."
Obi-Wan:"Good job."
Star Wars Episode II:Attack of the Clones