how to view TOAST table

Hi

I have a table which has a column with datatype BYTEA.
In order to trigger TOAST mechanism for the column, I have made the following alteration.

ALTER TABLE table_name ALTER COLUMN column_name SET STORAGE EXTERNAL

Please suggest me if I have to make any other changes.
Also I am unable to view the TOAST table.

Please help me out in viewing the table.

Thanks.

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