Recipe editor item keys
Just like what in the JSON happens, it'd be nice if we could define our keys and pattern separately. This would be especially useful if you have a lot of a single item in a recipe.
If I understand correctly, you want to put the same item in multiple item slots. In this case, you can already drag-drop a item from a slot to another one while holding Ctrl to duplicate the item to the target slot. A normal drag-drop will move the item instead.
Aha yes this works, maybe a list of controls/shortcuts could be added for other people?
I agree that the behaviors need to be documented. Maybe I will add cut/copy/paste command in the context menu (but not shortcuts due to technical limitations), so I will leave this issue open for now.
I decided to add a status tip which display the following text when hovering an item slot: "Drag-drop to move item(s). Ctrl+Drag to duplicate item(s)".