Apple Soundtrack Pro 2 - Manual (Page 524)

524 Appendix F Using Apple Loops Utility
Assets Drawer
The Assets drawer lists the files open in Apple Loops Utility. The drawer, which is open
when you open Apple Loops Utility, contains a Name column with the name of each
open file, and a Changes column, which indicates any files to which you have
applied changes.
Add File and Remove
File buttons
Changes column