How do i change Audio Waveform Display

Hello, im trying to change the way i can see the waveform while im editing videos. As it is now i can not see the points where a sound start/stops in my editing area but i can in the source area. How do i change the way it is displayed in the editing area?

Sorry, im still way new to all this and dont know the proper names of things yet. Thanks for your time

I have posted a pic below to clarify what im looking for.

http://i.imgur.com/t5BCsN6.png