[cs5] New to Flash. Simple Question

Hello guys and girls.
I am new to Flash and need some help with something that seems very simple.

I am creating an animation with sound.
The sound syncs with objects.
Everytime I synch an object with a sound, I test the animation out by hitting cmd+enter.

My question
Is there a way to only test out a certain portion?
It’s a big time waste to test the whole animation every single time.

Thanks for the help!