You can read any supported file format by using the File->Open menu item. You can also drag an file (icon) from the desktop or from a file browser into the white scan area. Starting with version 3.0.1 xyscan supports drag and drop actions. xyscan remembers the 5 last scanned images. If you decide to rescan a plot again use the File->Open Recent submenu. To remove all files form the history list use File->Open Recent->Clear History.