Basics

When you open DQMJ1 ROM Editor, it will open to the Mod Selection window. Here you create a mod and load a ROM to begin making changes to the game.

Create a mod

To create a mod, click on the Create a new mod (+) button and enter a name for the mod.

Mod Selection window with no mods created yet

Once you have created a mod and selected it, you can click on the Load ROM button to select a ROM to base your mod on.

Typically you'll want to select an original ROM for the game, but you can select an already modified ROM (ex. a randomizer).

Mod Selection window with one mod created

After loading a ROM you will be able to make changes to it and save those changes as a mod.