If using an iPhone or iPad start new Pass & Play game. Press the home and power keys simultaneously and release. Your screen will flash and a screen shot will be added to your photo album. Email the pic to yourself or download to your computer and edit in Photoshop or your favorite photo editor.
If using a Mac, start a game in Facebook. Press ⌘+Shift+3 at the same time. This will place a screen shot on your desktop. Edit in Photoshop or your favorite photo editor.
If using Winblows, start a game in Facebook. Press PrntScrn. Open Photoshop or your favorite photo editor and Paste the screen shot into an New document.