Trimming Audio?

I am new to FotoMagico and love the product but I cannot find how to trim audio music tracks easily within the slideshow. I am trying to do a show with 100 images each with a constant 3 second display for a total of 5 minutes and adding five songs cut to one minute each. I tried using markers and also just sliding the audio end but it does not seem to work. I would really appreciate any help. Thanks.

Found a relevant discussion. Please disregard. Thanks.