Update info on predefined devices

Author: ada

synthetics/test-config/devices.rst

@@ -5,20 +5,22 @@ Devices
 *****************************************
 
 .. meta::
-    :description: When you set up a test in Splunk Synthetic Monitoring, you can configure the viewport and network connection of the device from which the test is simulated.
+    :description: Select a predefined device to simulate a specific viewport size and network connection for a test.
 
-When you set up a test in Splunk Synthetic Monitoring, you can configure the viewport and network connection of the device from which the test is simulated. 
+When you set up a test in Splunk Synthetic Monitoring, you can select a predefined device to simulate a specific viewport size and network connection for that test. Every predefined device is a combination of a specific viewport size and network connection. 
 
-Because browser tests capture the visual experience of a page, while uptime and API tests only capture response data, viewport settings apply to browser tests only. Network connection settings apply to all test types. 
+* A viewport is the framed area on a device's screen for viewing information, such as the browser window on a desktop. Since a viewport is an integral part of the visual experience of a user interacting with your application or site, viewport settings only apply to visual tests (browser tests). Viewport settings don't apply to API or uptime tests, because these tests are non-visual -- they only capture response data from your application or site.
+* A network connection is the network type, speed, bandwidth, and latency experienced by a device. Since a network connection is an integral part of all experiences, network connection settings apply to all test types. Testing your site or application from a variety of network connections helps you to monitor the experience of users in a variety of environments.
 
 
-Viewport
-===================================
-Browser tests capture the visual experience of a user interacting with your application. The viewport is the framed area on a device's screen for viewing information, such as the browser window on a desktop. By default, browser tests run from a desktop-sized viewport, but in the test creation view you can select a different device type to test the user experience from a different viewport size. 
- 
+Select a device type for Splunk Synthetic Monitoring tests
+==========================================================
 
-Network connection
-===================================
-You can run browser, uptime, or API tests to simulate network connections of various latencies, including Mobile LTE, Mobile 3G, DSL, Mobile 5G, and cable internet. Testing your site from a variety of connection types lets you monitor the experience of users in a variety of settings. 
+All tests have the device type :guilabel:`Default Desktop` by default. To change this for any test, follow these steps:
 
+#. From the landing page of Splunk Observability Cloud, navigate to Splunk Synthetic Monitoring.
+#. Select the test that you want to change.
+#. Select :guilabel:`Edit test`. The test creation view opens.
+#. In the :guilabel:`Device` field, select one of the predefined devices.
+#. Select :guilabel:`Save`.