This button allow to add a new element to the table.
This button allow to delete the selected element in the table.
This button allow to duplicate the selected element in the table. Not all the tables have this button.
This button allow to move the selected element in the table to the top of the table itself.
This button allow to move the selected element in the table to the bottom of the table itself.
The elements of the table can only be edited when they are selected. Please, note that lot of them change when they are selected, to allow different types of edition.