The Drag and Drop User Interface displays the following two lists. The left-hand list comprises the accessible drives, directories, files, and source code control systems on the workstation while the right-hand list comprises the mainframe internal reader, Endevor qualifications, and accessible data sets on the mainframe. You can use the right-hand mouse button for a variety of context menus that set values and perform functions. You will need to use this frequently to get the most out of the application.