Use schema name with period in psql command to obtain information about this schema.
Setup:
test=# create schema test_schema;
CREATE SCHEMA
test=# create table test_schema.test_table (id int);
CREATE TABLE
test=# create table test_schema.test_table_2 (id int);
CREATE TABLE
Show list of relations in test_schema:
test=# \dt test_schema.
List of relations
Schema | Name | Type | Owner
-------------+--------------+-------+----------
test_schema | test_table | table | postgres
test_schema | test_table_2 | table | postgres
(2 rows)
Show test_schema.test_table definition:
test=# \d test_schema.test_table
Table "test_schema.test_table"
Column | Type | Modifiers
--------+---------+-----------
id | integer |
Show all tables in test_schema:
test=# \d test_schema.
Table "test_schema.test_table"
Column | Type | Modifiers
--------+---------+-----------
id | integer |
Table "test_schema.test_table_2"
Column | Type | Modifiers
--------+---------+-----------
id | integer |
etc...