otherwise you get misleading statements for synonyms, e.g:
create synonym XYZ for XYZ;
-- instead of
create synonym target_schema.XYZ for source_schema.XYZ;
note this seems to work correctly for views, though.
Unchecking the "schema" box in the DDL options should only result in the omission of the logged-in (or better yet, current) schema for the connection.