The Blue Crane Digital Canon Rebel T3i In-Brief Laminated Card eliminates the need to carry around the owner's manual by giving you the most common controls and settings in a handy booklet. The inBrief reference cards answer most camera operation questions quickly and easily. The information is arranged logically for ease of use. The T3i reference card is laminated with foldable hinges so it lies flat and is easily stored in your camera bag. The first panel contains a color-coded index to the rest of the panels. For instance, if you have a question about white balance, just check the index and find your answer on the purple panel.