# Possible to add custom TXXX tag (user-defined text)?

**URL:** https://community.mp3tag.de/t/possible-to-add-custom-txxx-tag-user-defined-text/66656
**Category:** Support
**Created:** [November 28, 2024, 2:00pm UTC](https://community.mp3tag.de/t/possible-to-add-custom-txxx-tag-user-defined-text/66656 "2024-11-28T14:00:23Z")
**Posts on this page:** 1
**Showing post:** 4

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### Author: ![ohrenkino](https://community.mp3tag.de/user_avatar/community.mp3tag.de/ohrenkino/32/4843_2.png) [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [November 28, 2024, 2:58pm UTC](https://community.mp3tag.de/t/possible-to-add-custom-txxx-tag-user-defined-text/66656/4 "2024-11-28T14:58:02Z")

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See the mapping for GROUPING:

> **[Tag Field Mappings – Mp3tag Documentation](https://docs.mp3tag.de/mapping/#grouping)**
>
> Overview of all available tag fields, their names in Mp3tag, and how they are mapped to the internal structures of the different tag formats. Mp3tag is the universal Tag Editor.

If there is a standard field, then MP3tag will not allow you to write it as a user-defined field.  
AFAI see it, GROUPING is not available as standard field for MP4 files - so there you would get a user-defined field with the name GROUPING.

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_[View the full topic](https://community.mp3tag.de/t/possible-to-add-custom-txxx-tag-user-defined-text/66656)._