The Dungeon Master Editor is a program by Edward Penman that can edit the dungeon of Dungeon Master.
It is available for Atari ST (version 2.20) and for Amiga (version 1.1).
A demo of The Dungeon Master Editor v1.02 by Edward Penmann was published in ST-AMIGA Format coverdisk in Issue #5, November 1988. You can download it from ST Amiga Format Magazine Cover Disks. It was named "The Ultimate Dungeon Master cheat routine" at that time.
This Amiga version does not work with Dungeon Master v3.6.
The manual contains maps and hints for the game (see below).
This is the contents of the Amiga version:
These are scans from an unknown version (Amiga or Atari ST?):
As seen above, the Dungeon Master Editor Manual includes a hint book called "The way of the Firestaff" that was released previously. The content and maps were changed a little from the original version. Here are scans of the pages that were different in the original version: