Close File Click on the Close File item in the File menu to close a file. The CDA Viewer remains active when the file is closed. The CDA Viewer closes the current file before opening a new input file. For information related to the Close File menu item, double click on an item from the list of additional topics below. Additional topics: * Overview of the CDA Viewer * Document Information... * Open... * Diagnostic Information... * Exit * Using the CDA Viewer Window * Opening a File