imovie

hi guys.

i want to ask some question about my imovie.

yesterday I saw that some people can use the option picture in picture or somethin' in their i movie.

But it's different with mine.

Why there's no option for pip, greenscreen, or the other in my imovie?

I've tried to find the problem but i couldn't find it. Please help me.

There's only replace, insert, and audio only in my option when i moved the clip to my project.

I use Mac OS X version 10.6.8

iMovie'11 version 9.0.4