I can't see the "Render work area"

Gentlemen !

I work with

Adobe CS4 AE fully updated

Ram 6GB

Footage 1920x1080 24fps

Windows 7 Ultimate

Well, if I am not mistaking , there was something called " Render work area" as well as  " Render effect area"

Evertime I wanna sync a part of a song with the lip syncing , the audio is off a bit, but I remember there was a way to render just a part of the video before rendering the entire clip or there was a short cut such as space bar or enter, but seems like that don't work either , any help will be appreciated greatly thanks.