README.md in datadog_api_client-1.4.0 vs README.md in datadog_api_client-1.5.0

@@ -105,20 +105,41 @@
 end
 ```
 
 where `<unstable_operation_id>` is the name of the method used to interact with that endpoint. For example: `list_log_indexes`, or `get_logs_index`
 
+### Changing Server
 
+When talking to a different server, like the `eu` instance, change the `server_variables` on your configuration object:
+
+```ruby
+config = DatadogAPIClient::V1::Configuration.new
+config.server_variables["site"] = "datadoghq.eu"
+client = DatadogAPIClient::V1::APIClient.new(config)
+```
+
 ### Disable compressed payloads
 
 If you want to disable GZIP compressed responses, set the `compress` flag
 on your configuration object:
 
 ```ruby
 config = DatadogAPIClient::V1::Configuration.new
 config.compress = false
 client = DatadogAPIClient::V1::APIClient.new(config)
 ```
+
+### Enable requests tracing
+
+If you want to enable requests tracing, set the `debugging` flag
+on your configuration object:
+
+```ruby
+config = DatadogAPIClient::V1::Configuration.new
+config.debugging = true
+client = DatadogAPIClient::V1::APIClient.new(config)
+```
+
 ## Documentation
 
 If you are interested in general documentation for all public Datadog API endpoints, checkout the [general documentation site](api docs).
 
 Developer documentation for supported endpoints and models is divided based on API version prefix to [`v1`](/docs/v1/README.md) and [`v2`](/docs/v2/README.md).