nx slotIn this video, we learn about Sketch (Slot) in NX. #Slot #nxcad #NX2312 Please Support Us. LIKE | SHARE | SUBSCRIBE |.What is SLOT NX? By simply attaching an option board to the slot, you can build a flexible system with a wide variety of interfaces such as DisplayPort™, 12G-SDI, HDMI and DVI-D.