Rename files function let you batch rename files in library with specific rules using tag's value. Which make your files well orgnized in Finder.
Click of Popular Actions at Tools Bar Section. The Rename files module will come up with sheet attatched to main window:
We have a file named "around the world.xxx", and the Track Number is 2, the Disc Number is 1.
Drag specific tag(s) from bottom input box to the Format field:
Track Number,_,Disc Number,_,File Name
Which means the file will be renamed with [Track Number]_[Disc Number]_[File Name], The Track Number of the file is 2, Disc Number is 1, and filename is "around the world", So the result file name should be:
2_1_around the world.wav
Live filename preview is avaliable in Preview section
Before you perform Rename action, you have the chance to choose whether to Repace original file or Export to new place in local drive.
This kind of rules to rename files can be applied to all files in library by checking Rename all files in Library at bottom left of rename window.