So, B Major 7 as a Barre chord. Very simple. We gonna take E Major 7, the shape. Just turn it around just so my first finger is free because that's what we need to use this as a bar and I'm gonna move that to the 7th Fret. So here's my bar at the 7th. I have what look like AM7 but now we turned it to B Major 7 and then I can do the same thing with the A form, right. Here's my original A chord. When I flip that around so my first finger is free and then put that on the second Fret and that's it. B Major 7 as the Barre chord.