Hi, i'm back again. If you read all this forum, of course you already know and learn how to create picker. So now, i want to show you, how to link a picker to the detail.
Choose which columns will hide or read-only or update by checked ( no.4 ), after all set, click save button ( no.5 ).
After creating a picker, open detail in modul configuration. Choose the detail form, add an or some additional query for showing a picker from detail ( no.1 ).
Auto generate for showing the query added ( no.2). In one column (id column usually), its UI type menu changed to picker and in Control expression, linked to the picker's name ( no.3).