I just upgraded from Vegas 7 to 11 this year, though I only use it seriously about once per year in the Christmas season. Thus, I don't recall if v7, v4, or v3 had this feature or not.
I'm hoping to click-n-drag the cursor across the Trimmer timeline and see the video in the Video Preview window. Yeah, you can grab the tiny gray scrubber handle above the timeline, but that tries to scrub the audio...slowing the whole process down.
If I add the full clip to the main project timeline I can do the click-n-drag the timeline cursor in a blank area to "scrub" across the video to see it move.
Any thoughts?
Also, any keystroke to open a selection in the Media Manager to the Trimmer (currently I drag n drop)