Is this crossbar setup fake?

[ShinigamiB06]

no I have something similar myself actually. Though I just have 1 bar at the bottom. You can hide slots on the bars when they aren't in use. When you do the only ones you see are the ones with icons in them so he could have multiple horizontal bars with that settings to hide the ones without icons. You can also turn on vertical hot bars so he could also just have 2 vertical ones up there. But yeah it can be done.

and how do you do that??