The editor number is a value between 1 and 32767 that is used by level editors to identify things placed in a map. In the DECORATE format specification, this value is listed at the end of an actor's declaration, before the actor block begins. Internally, a value of -1 for the editor number means that the actor cannot be placed in a map.

It is important to note that ECWolf's editor numbers are different from the editor numbers as defined in the Wolfenstein 3d source code and do not necessarily match. Currently no map editor supports ECWolf's editor numbers natively. A map translation lump is required in order to map ECWolf's "DoomEd number" to the editor numbers found in the original source.