Clean File Properties
This option allows you to make mass changes to selected files. You can convert underscores to spaces, remove leading and trailing spaces, change spacing to single-spaced, move articles to end (e.g., 'The Beatles' to 'Beatles, The'), and fix capitalization.
To access Clean File Properties, go to Tools > Library Tools > Clean File Properties, or right click on files and select Library Tools > Clean File Properties.
This option is not available on the "File Type" and "Media Type" fields.