Conditional Formatting Trick #4 – Highlight rows having duplicate values.I was using Nodus this time(I don't use it a lot). It does involve a hacked client which has freecam.
I tested in on Bukkit and Vanilla(both SP and MP). Then hover the cursor below where the trap door is placed(highlighted in the picture). To start duplication, toggle Smart Cursor toOn. The back wall behind the sign is essential, as you cannot place a sign directly on top of a trap door. This is part of a series of videos detailing the kn.
