Debug mode is a specialized mode in N that can be accessed by pressing the backslash or ~ key in the main menu. It is designed for use in creating your own maps. It can be used to create and replay demos, as well as several other tasks. A complete overview can be found in the manual downloaded with N, or you can look at the image below.
Edit Menu - 1Edit
There are several options to choose from the edit menu.
- [M] - Go back to N's main menu.
- [L] - Loads a map into the level box (2).
- [S] - Saves the level data inside the level box.
- [J] - Empties the screen of tiles and objects so you can start fresh.
- [H] - Fills the screen with tiling, perfect for maps with enclosed space.
- [E] - Accesses Ned.
- [R] - Resets your placed objects to where they originally were after you've playtested your map.
- [T] - Performs [e] and [r] simultaneously.
- [P] - If you are still playtesting, press this to resume play.
-  - Starts recording a demo of your playtesting in the demo box (3).
-  - Stops recording a demo of your playtesting.
- [Q] - Allows you to play back your demo. Press this and then [P].
- [W] - Stops all actions involving your demo and allows you to playtest your map further.
-  - Loads a demo into the demo box.
-  - Saves the demo data inside the demo box.
Level Data Box - 2Edit
Level data is generated in this box as you continue to edit your map. When you are completely finished editing your creation, you can either right-click the box and left-click "select all" to gather up all the data and store it somewhere else, such as NUMA. Or you can simply press [S] and store the data from there.
Demo Data Box - 3Edit
Demo data is generated in this box as you record a playtesting session of your map. When you are completely finished recording, you can either right-click the box and left-click "select all" to gather up all the data and store it somewhere else. Or you can simply press  and store the data from there.