I just got the trail on Magix edit pro. I got it once but forgot how i did that.

I know how to use the Volume curve. I was playing the movie while working with the volume curve and i noticed the sound was getting louder while i was adjusting the volume curve. So i Forgot as i was getting the hang of this program. How do i listen to the sound while adjusting the volume to get if that section is loud or low/ or just even good with the rest.