Could you tell me the addon?

Hi everyone,

I’ve been watching Grubby’s WoW videos and noticed how his action bars are perfectly aligned with that classic WoW look. I’m curious if anyone knows how he achieves this particular setup? I tried to use Bartender and Dominos, but those addons removed that classic WoW look of the bottom action bar.

Here’s a screenshot for reference:

https://i.postimg.cc/yDj1vV6b/Grubyb.png

Any help or tips would be much appreciated!

Thanks in advance!