Getting rid of unused video?

Question

Hi, so, I'm just trying to use this software for the first time, to put together some clips of my daughters at their first July 4th parade.
I imported the video, I took the clips I wanted from the Event and I put them into a Project, and then I trimmed them all to go together the way I want.
So now, up in the Event window, I see all my clips, and there are little orange underlines showing the parts of the clips that I'm actually using.
I want to get rid of everything that isn't underlined in orange.
Is there a way to do something like "select unused footage," which will put selection brackets around everything unused, and then delete it?
Or maybe to do something like "select only used footage," and then trim all those selections so that they're independent clips, allowing me to easily delete the unused clips?
Or any other way, perhaps? The only remotely related thing I can find is that "Space Saver" feature, but it only works at the level of entire clips, it won't weed out the unused portions inside a clip.
Any help?

Answer 1

I've figured out how to do it, it's relatively simple, and I'm posting it to share with anyone else who might need it.
Although it's simple, there's a bit of a trick to it:
1) Before you do anything else, you have to mark every clip you're going to use as rejected all the way through. Every clip you intend to use should be completely marked with a red line before you start.
2) As you review your clips, choose the footage you want to use, and mark it as a favorite. Do this all the way through your project.
3) Choose to view only favorite footage, then select all of it and drag it into the project window. iMovie will advise you to be more choosy before moving footage to your project. Just ignore it.
4) Your project should now contain all (or most) of the footage you want to use. Now go ahead and make your movie--edit and arrange the clips, etc. Go wild.
5) When you're done, and you're sure you're done, i.e. you're ready to delete all the unused footage forever, go back through the event window and just make sure that you haven't used any rejected footage in the project. All the used footage will be shown by an orange bar at the bottom of the footage, and the rejected by a red bar at the top. Make sure there is no point where orange and red footage overlap. If they do overlap anywhere, just un-reject the overlapped footage. It won't be hard.
6) You should be really really sure you're done now. And if you're sure, just choose to view only rejected clips in the event panel. All of your unused footage will now be displayed! All you have to do is press the button at the top of the events panel that reads "Move Rejected Clips to Trash." Presto, footage gone. (But note: if you have any clip where *any part* of used footage overlaps rejected footage, none of the rejected footage from that clip will show up. iMovie will only show selections from within a clip if the whole clip is free of overlapping footage. Odd, but there you go.)
7) Once you've pressed that button, it all vanishes from iMovie. Then you simply empty the trash from the Finder, and say hello to extra hard drive space!
I hope this helps anyone in my situation or similar. If people tell you that no program anywhere ever ever ever will do what you want, don't listen. iMovie will, and it's not even that hard.
Message was edited by: jessewclark