Screenshots are fairly easy.
If you use the Enhanced Client, just hit the "Print Screen" button on your keyboard and the file is automatically saved inside an EA-Games folder inside the MyDocuments file on your hard drive.
If you use the Classic Client, hit "Print Screen" and then open a program that can work with screenshots. MS-Paint comes included on most Windows OS computers and will work fine. Just load up MS-Paint and then hit the "Ctrl-V" keys to paste the screen shot into MS-Paint. Hit file and save as needed.