Selecting an Options File The Options File window opens when you click on the Options File... button in the Open window. The options file you select contains processing options that apply to the particular format of your input file. These processing options help ensure minimal changes in the format and content of your input file while it is processed for display. An options file is a text file that you create before starting the CDA Viewer application. The default file extension for an options file is .CDA$OPTIONS. When you select an options file, the processing options apply only to the next input file you display. The appearance of the currently displayed file, if one exists, does not change. An options file is not required. Default processing options are applied automatically. However, you may require an options file if you need to use other than the default settings. In the Options File window, do the following: 1. In the Directories list box, click on the name of the directory that contains the file you want to apply. 2. In the Files list box, double click on the name of the file; or click on the file name and then click on the OK button. By default, only files with the .cda_options extension are displayed, unless you modify the options file filter. 3. In the Options File entry box, you can type the name of the options file instead of selecting it from the Files list box. 4. In the Options File Filter entry box, you can change the list of file names displayed by typing a new Filter specification and clicking on the Filter button. 5. Click on the OK button to complete selection of the options file. 6. Click on the Cancel button to cancel the Options File window. For information related to selecting an options file, double click on an item from the list of additional topics below. Additional topics: * OK Button in the Options File Window * Filter Button in the Options File Window * Cancel Button in the Options File Window * Help Button in the Options File Window * Overview of the CDA Viewer * Using the CDA Viewer Window * Opening a File * Selecting Display Options * Creating an Options File