How to Take a Screenshot
To take a screenshot, press and hold the question mark Help icon in the upper right corner for 3 seconds. You can take a screenshot in any screen that has the Help icon.
When the screenshot is successful a camera icon appears and the tester beeps.
How to Manage Screenshots
Go to Settings > Manage Files > In upper right corner touch the drop-down arrow to the right of "Session Files" to see more choices. Select Screenshot Files.