Click on a file name suffix to select it. File Type menu Use this menu to select a file type to be associated with the file name suffix in the text field. Type or paste a file name suffix here to be added to the list. Click here to replace the selected file name suffix with the file name suffix in the text field. Click here to remove the selected file name suffix from the file name suffix list. Tip: To remove all file name suffixes from the list, hold the option key and click here. Click here to add the file name suffix in the text field to the file name suffix list. Click here to turn on or off the use of the file name suffixes list. If turned on, the list is used to recognize files that cannot be recognized by their file type.