text: i'm making a short powerpoint presentation for my class and need help adding music- please help me!!!!!!!!!!! i know how to add the song, but i can't get it to play for the entire show, on all slides. i've tried modifying it in the affect options. i know somewhere there is supposed to be a place where you can choose for the song to play for so many slides, but i can't find that option. this project is due soon,so any help is appreciated  