Drum Assignment Display Use the Drum Assignment Display within the Program Names dialog box to assign individual Drum Names to specific MIDI note numbers. Click and hold the mouse on an 'Unknown' or existing Drum Name and choose a new Drum Name from the list of Drums in the pop-up menu; the new Drum Name will be assigned to the corresponding MIDI note number. Click on the Add User Drum button to add a new User Drum Name to the list of Drums Names (for the currently selected Drum Set) in the Drum Assignment Display pop-up menu. Click the Save and Done button to save changes and exit the Drum Sets dialog box; click the Done button to exit the Drum Sets dialog without saving changes. Keep in mind that Metro will not allow the transposition of User Drum Names when transposing a Drum track from one Drum Set to another.