File Types List File Type Edit Text To close this dialog box, click this button (or press the Return or Enter key). Name Edit Text To replace the selected file type in the adjacent list with the file type appearing in the boxes atop the list, click this button (or press Cmd-R). To delete the selected item from the adjacent file type list, click this button (or press Cmd-D). To add a file type to the list, type the word in the box to the left then click this button (or press the Return or Enter key).