from the manual
...create a table following this scheme:
CREATE TABLE `pma_relation` (
`master_db` varchar(64) NOT NULL default '',
`master_table` varchar(64) NOT NULL default '',
`master_field` varchar(64) NOT NULL default '',
`foreign_db` varchar(64) NOT NULL default '',
`foreign_table` varchar(64) NOT NULL default '',
`foreign_field` varchar(64) NOT NULL default '',
PRIMARY KEY (`master_db`, `master_table`, `master_field`),
KEY foreign_field (foreign_db, foreign_table)
) TYPE=MyISAM COMMENT='Relation table';
put the relation table name in $cfg['Servers'][$i]['relation']
now as normal user open phpMyAdmin and for each one of your
tables where you want to use this feature, click "Structure/Relation view/" and choose foreign fields.