Click "Add Crafting Item" then fill out the thing to add an item for crafting. You can click "Delete Crafting Item" To delete a crafting item. You can click "Add Result Item" to add an item to appear once you drop enough of the things in "Items" on the ground. You can also delete a result item by clicking on "Delete Result Item." After you've finished, click create and follow the instructions on that.
By @creeperbot65 (Me)