I don’t think i have nearly the skills to catch that in motion. It’s just a little bar a few pixels wide, that pops in for a split second. I don’t have the reflexes. I could maybe make a mockup in photoshop, but here’s a detailed description.
At the top of the UI, underneath the menu bar, there is a tab for projects, etc, in the normal layout. Right above this tab, a tiny line is drawn for a moment, adjusting the ui down and to the right by 3 pixels or so, then it goes away, and the ui redraws back to the upper left.
I have no idea how to capture that fast enough.