The crafting recipe overview is the root menu from which you can add, edit and delete crafting recipes. It should look like this:

The create recipe buttons, the copy button and the edit button will open up a submenu where you can edit the crafting recipe. For more information about that process, head over to the individual pages of the submenus:

The edit and copy buttons open the submenu of the type of recipe that is edited/copied. In the case of copy, clicking the create/apply button will create a new entry with the modified recipe. In the case of edit, clicking the create/apply button will replace the recipe of that entry with the modified recipe.