First time ever using iMovie, following tutorials things seem to go OK. after cropping a clip, the part not used should, according to the tutorials I've looked at, go into the trash - well, it's not in the trash. I need to get something out of the trash; however, there's nothing in the trash. What am I doing wrong? Where's my trash? Any help would be greately appreciated. Have iMovie HD 6.0.3. Thanks.