Numeric or Text?

I'm adding "Compilation" to my tags and used the options menu, however I find that this tag only supports numbers not text (or am I wrong cause if I type a word I only get a number)

What I would like to do is change the "CONTENT" tag in the properties of the mp3 which reads "Part of a compilation" to the correct tag weather it be yes or no.

I've added one other tag via the options which is "PUBLISHER" in the "ORIGIN" part of the mp3 properties and this is working fine.

Am I doing something wrong or this tag cannot be changed via MP3TAG? I'm terrible at coding so if this requires special coding all the help you can give me would be appreciated. Thanks.

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The Compilation tag should be set to 1 or get deleted.