Click "Window" and select "Piano Roll." This opens a grid graphic. The vertical axis represents pitch and the horizontal axis represents time, measured in beats.
Press "Play" and let the track roll. Follow the vertical bar as it scrolls along. This bar indicates moves in time with the music and helps you to identify notes as they sound. Press "Stop" to stop the track at the point where you wish to begin editing the individual notes in the piano roll editor. You can use the space bar to play and pause the track. Hit "Return" to send the track back to the start.
Click on and highlight the note you want to fade out. The notes are represented by small, colored rectangles in the grid. Notice the horizontal line inside the colored rectangle. This is an "event velocity" marker, indicating how loudly that note was played during recording.
Click "View" and select "Zoom In." This enlarges the individual notes on the screen, giving you a clearer view of their properties.
Click "Automation" to further expand the highlighted note so that you can manually edit its properties. Notice two more horizontal lines, one just above the bottom of the rectangle and one in the middle. The lower line represents "Zero." In this context, the zero line represents zero volume, or silence. The higher line represents the current volume of the note. To create the fade, draw a line between the current volume point and zero volume.
Click on the expanded rectangle in the top center to create the first automation point. Click again on the zero line at the point where you want the volume to fade away entirely. The automation tool will create a line between the two automation points that represents the fade of the note. Make a steep line for an abrupt note fade or a gentle slope for a smooth, gradual fade.