- Supported Minecraft Versions
You must put a copy of the world edit plugin jar in the skript-reflect folder, too.
This skript will display the boundaries of your world edit selection. If the selection is not cubic, 2d poly, or sphere/ellipsoid, it'll show the cubic bounding box instead, which will not be accurate to the blocks that are selected.
Use //cui to toggle the visualizer on and off.
Default permission to use the command is server.worldedit.cui