An Editor Wand is a tool in RTB where players are given the ability to edit, and modify brick sizes. When you have the Editor Wand out, you can press CTRL+E to activate the settings. Once in the settings, edit the SCALE from 0 0 0 to whatever you like. Play around a bit to understand the numbers better. The Editor Wand was first seen in Vanilla, but was taken out of Retail due to unrealisticness and lag.