You can add a list item or folder by copying an existing item or folder. Put the cursor to an item or folder and then, on the All actions menu, click Copy.
This opens an item creation form filled with attribute values taken from the source item. If the list does not feature an automatic code assignment, the code of the new item is copied from the source item.
You can edit the values using the general rules described in Editing list items.
Next page: Editing list items