Import Set Choose the Import Set button to import a previously saved Metro Drum Set file from disk. Select the desired Metro Drum Set file within the File Selector dialog box and click the Open button; the new Drum Set will now be saved to a resource within the Metro application and will be accessible within the Drum Set pop-up menu (in the Drum Sets dialog) and the Drums display of the Graphic Editor window. When finished, click either the Save and Done or Done button to exit the Drum Sets dialog.