X-Ray Calc is a software for computer simulation of X-ray reflectivity, including normal incidence and grazing incidence X-ray reflectometry (NIXR and GIXR). The X-Ray Calc distribution contents several demonstration projects located in the Examples folder To see the demos, click the Open button, navigate to the Examples folder, and select a project file. Go to the Calc tab and click the Calc button (Or press F5). Call the manuals thought the "Help" tab for more information.