OK Button in the Open Window Click on the OK button to complete your selection of the input file and format. The selected input file will appear in the CDA Viewer window, and the Open window will disappear. For information related to the OK button, double click on an item from the list of additional topics below. Additional topics: * Overview of the CDA Viewer * Opening a File * Filter Button in the Open Window * Cancel Button in the Open Window * Help Button in the Open Window