Opens a window where you can select which properties to copy:
Lets you copy the properties of the current menu, popup, movie or playlist to the specified menus (popups/movies/playlists) of this subtree.
You can choose which properties to copy. Use the two check boxes in the top right corner to select/deselect all of them.
To unassigned (empty) only - copies only those properties that are not yet assigned in the target tree item.