I've really enjoyed this course thus far. I seem to be having trouble with seeing the brush change opacity and size on the...

posted to: Blending
I've really enjoyed this course thus far. I seem to be having trouble with seeing the brush change opacity and size on the fly. I use Photoshop CS6 and alt + Right click does work. But I don't see the brush preview showing me what it will look like on the fly. I think I have it turned on in the cursor settings, but for some reason I am not seeing the red preview brush. Can someone help me?