Open Choose the Open command to open an existing Metro document file, standard MIDI file or a Metro Bundle file. A dialog box will appear in which you may select thedocument you want to open; then click Open or double-click on the document to open it. As with the New command, the currently open document closes after Metro prompts you to savechanges. Opening a Metro file replaces the current file in memory. See Also: Opening Old Metro Document Files The Basics