Multiple values

WMP use the semicolon as a separator.
It allows you to enter multiple descriptions in one tag.
See artist for a example.
It doesn't work on all the tags and is dependent on the file format.

Using multiple values in genre works in the interface but will write the first value only in MP3 files.

Tag the genre of a song with Hits and the period 00s

Edit the Genre column is one way to do it.

You might do the same using the advanced tag editor:

Apply and the second part is gone. This obvious don't work using the advanced editor (maybe because it is a MP3 file)

You can edit the genre field in album view.

All the genres now have multiple values

In Genre you can see the 00s.

Let’s change this to 2000s

Open it