How do I disable double click to enter Waveform mode

Hello,

I've been using Audition 3 for many years and now i've just started CS6. I remember there's a way of disabling double click to edit a clip in Waveform/Edit mode from multitrack but i can't remember how to do it. It's so easy to accidentaly double click to enter waveform mode which i hardly ever use. I'm a multitrack gal!

Thank you,

H