FAQ/Screenshots
From PWI Wiki
Screenshots are taken by pressing the F9 key (by default) - you can then zoom around a camera using the controls to set up your shot, and take it - with or without the UI. (With the UI if you want to raise a customer support ticket, otherwise without is usually prettier)
They will then arrive in your perfect world directory, in element\screenshots.
(Exactly where depends upon where you installed the game to - check the properties of the shortcut you use to launch the game if you are unsure.