Display the composite alternate key

[S-Jenya]

In PostgreSQL, I created a constraint (a composite alternate key):

CREATE UNIQUE INDEX i_1ON sp_region (code ASC, name ASC);

For table:

CREATE TABLE sp_region
(
  id        serial    NOT NULL,
  code      int4      NOT NULL,
  name      varchar   NOT NULL,
  dt_create timestamp NOT NULL,
  PRIMARY KEY (id)
);

It would be convenient to display the composite key on the diagram for each attribute that is part of the key.

code - AK 1.1
name - AK 1.2

For example:

Or

Or