By default all the objects that were found to be different during the comparison of the two databases are marked for inclusion in the synchronization script. However, you can choose to exclude or include certain objects from the comparison by un-checking/checking the "Sync" checkbox next to each object. Selecting or un-selecting a parent object will also affect it's dependent objects - for example, if a table is un-selected then all its primary keys, foreign keys, indexes etc. are also un-selected.