This is a basic code sequence to set the Default Access Privileges on a PostgreSQL database. This example  defines future privileges for future objects for this user. But what if you want to view the stored  information about default access privileges ? There is a view called pg_default_acl

ALTER DEFAULT PRIVILEGES IN SCHEMA myschema GRANT ALL PRIVILEGES ON TABLES TO myuser;
ALTER DEFAULT PRIVILEGES IN SCHEMA myschema GRANT ALL PRIVILEGES ON SEQUENCES TO myuser;

If you want to view the default access  information stored you can use the PG_DEFAULT_ACL view.  The default record set i.e SELECT * FROM PG_DEFAULT_ACL  will return a recordset , but it can be difficult to read - without some further digging .

mydb=#SELECT * FROM PG_DEFAULT_ACL

defaclrole | defaclnamespace | defaclobjtype | defaclacl
------------+-----------------+---------------+--------------------------
10 | 25457 | r | {myuser=arwdDxt/postgres}
10 | 25457 | S | {myser=rwU/postgres}

The column names are fairly self explanatory , but here's a quick summary from the postgresql documentation

To make this more readable , use a query such as :

select pg_get_userbyid(d.defaclrole) as user, n.nspname as schema, case d.defaclobjtype when 'r' then 'tables' when 'f' then 'functions' end as object_type,array_to_string(d.defaclacl, ' + ')  as default_privileges from pg_catalog.pg_default_acl d left join pg_catalog.pg_namespace n on n.oid = d.defaclnamespace;