M C Hunt

When I started creating my video, adding individual files , initially all the individual files were shown in the media box. Now that I have "saved as" and named my video, when I go back in to continue work on it, individual videos are no longer shown. I am therefore having difficulty doing some trimming and so forth, of individual clips, since I can't readily identify them. Is there a SELECT ALL, or some other function that will bring all the individual clips back into view? Thank you!