Type Snipping Tool in the Cortana bar (bottom left next to Start button). Snipping Tool allows to take a screenshot of an entire window, a rectangular area or freeform area. Once you get the app open, I think you'll figure it out. Simply use the Snipping Tool to capture your review when you have it open.
Mouse over bottom right corner to get Charms Bar. In the Magnifying Glass icon, type Snipping Tool.
Start > All Programs > Accessories > Snipping Tool