Premiere Pro New Features – Symmetrical Transition Trims
In Premiere Pro CS6, when you trimmed a transition, it would pull from one side of that transition leaving the other side in place.
I personally found this a bit odd, because typically I wanted an to make an adjustment to both sides of the dissolve. Now, in the new version of Premiere, that is the default behavior. Watch the video for tips and tricks, including how to trim asymmetrically if you need to.