Some applications register no file types, but can attempt to open any file.
Advanced User Dialog Box To open a dialog box which allows the file type to be changed, hold down the option key when you choose the application from the menu. The original creator code and file type of the first file in the Finder selection are displayed inside parenthesis on the right hand side of the dialog. The dialog box is automatically placed close to the mouse cursor to minimize mouse travel and speed use of the dialog. The dialog box will cancel itself after around 30 seconds if no actions occur in the dialog box. The cancel button will flash occasionally as a warning.