please accept my apologies for the delayed response. We decided to improve generation of indexes to foreign keys. In older versions it was possible to generate indexes to DDL code, but it always resulted in problems in synchronization (because such generated indexes existed only in database and not in the model as model objects). Version 5.3 introduces the possibility to create indexes to foreign keys as model objects. See attached screenshots.
In Settings | Options, in section **Model | Physical Model ** you can specify Index to Foreign Key Name value.
The key benefit is that you can name the indexes as you wish, you can easily synchronize model with database and get better results of comparisons.