Managing media with the library
Sorting items in the Library panel
Columns in the Library panel list the name of an item, its type, the number of times it’s used in the file, its linkage status and identifier (if the item is associated with a shared library or is exported for ActionScript), and the date on which it was last modified.
You can sort items in the Library panel alphanumerically by any column. Items are sorted within folders. Click the column header to sort by that column. Click the triangle button to the right of the column headers to reverse the sort order.
When You create Flash animation which use huge amount media easily media searching becomes a key thing. Sorting media in library may help You arrange items, do You can fount the one You need in no time. 
