Document effective DRF settings

docs/settings.rst

@@ -34,4 +34,27 @@ This can be done in the following way:
             }
         },
         "SECURITY": [{"ApiKeyAuth": [], }],
-    }
+    }
+
+Django Rest Framework settings
+------------------------------
+
+Some of the `Django Rest Framework settings <https://www.django-rest-framework.org/api-guide/settings/>`_
+also impact the schema generation.  Refer to the documentation for the version that you are using.
+
+Settings which effect the processing of requests and data types of responses will usually be effective.
+
+There is explicit use of these settings:
+
+- `COERCE_DECIMAL_TO_STRING`
+- `UPLOADED_FILES_USE_URL`
+
+The following settings are ignored:
+
+- `SCHEMA_COERCE_METHOD_NAMES`
+
+The following are known to be effective:
+
+- `SCHEMA_COERCE_PATH_PK`
+- `FORMAT_SUFFIX_KWARG`
+- `URL_FORMAT_OVERRIDE`