Use in-game item editor keybinds
masterOnce developer mode is enabled, you can use the following keybinds in-game to edit or add items and recipes:
k: Opens the item editor. (Tip: Type&&to produce the§symbol).o: Adds the current recipe while in an items recipe menu.y: Opens a pane on the left side of your inventory.left ctrl: Hold to display the NBT data of an item.left ctrl+h: Copies the NBT data of the item to your clipboard.b: Adds the essence toessencecost.jsonwhile viewing an item's essence guide.
After making changes, your modified files can be found in .minecraft\config\notenoughupdates\repo.