How to enable relation view in phpmyadmin

first select the table you you would like to make the relation with >> then go to operation , for each table there is difference operation setting, >> inside operation "storage engine" choose innoDB option

innoDB will allow you to view the "relation view" which will help you make the foreign key

Change your storage engine to InnoDB by going to Operation

If it's too late at night and your table is already innoDB and you still don't see the link, maybe is due to the fact that now it's placed above the structure of the table, like in the picture is shown