File:LHmusic workflow12.jpg

Summary
Add music VII:
 * "Users can select items will fade out the text color to indicate user which one they selected.
 * User can select items and click add to list, drag and drop.
 * User can select items and copy/paste,or drag/ drop from another folder.
 * Users can see the number of songs and duration."

From Heesung Koo's website (link now dead, not available in the Wayback Machine)