The computer clipboard is a place to hold images temporarily in memory. It's used to share images between applications, or in the same application. You must always first copy an image to the clipboard, and then paste it in another place. To copy an image you have to select it, and then to press Control+C. Holding the Control button, pressing C, and then releasing the control button (On mac use CMD instead of Control). Now the image in the clipboard, and you have to enter this website. Then press Control V. Pressing Control and holding, then press the letter V, and releasing the control (On Mac use CMD instead of Control). You will immediately see the image. Now you can use the ctrl.vi built-in editor to crop the main parts, highlight, print, and share. By clicking on "Share" the tool will create for you a permanent URL so you can share the image not only between applications in your computer, you can also share with anyone who has an internet connection. To remember the URL of this tool you just have to remember. Control V is like ctrl.vi. Enjoy.