# Copy TLEN to Length

**URL:** https://community.mp3tag.de/t/copy-tlen-to-length/63900
**Category:** Support
**Created:** [February 25, 2024, 1:40pm UTC](https://community.mp3tag.de/t/copy-tlen-to-length/63900 "2024-02-25T13:40:08Z")
**Posts on this page:** 1
**Showing post:** 6

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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: [February 25, 2024, 2:48pm UTC](https://community.mp3tag.de/t/copy-tlen-to-length/63900/6 "2024-02-25T14:48:46Z")

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The tag panel does not show any properties with a name starting with an underscore (at the moment).

> [@Beat](#):
>
> Do I need to use **Actions (Alt-6)** or **Scripting**?

oops, I never pasted the FAQ thread.  
Here it is:

> [@Actions and batch-operations](https://community.mp3tag.de/t/actions-and-batch-operations/967/15):
>
> How to copy one field value to another field? Example how to copy the content of the ARTIST field to the ALBUMARTIST field: Create a [new action](https://community.mp3tag.de/t/actions/967/2) in an existing action group or make a new action group. Action type: Format value Field: ALBUMARTIST Format string: %artist% Note: If you want to copy all possible values of a field (in case you have multiple artist fields), the internal scripting function [$meta\_sep](https://docs.mp3tag.de/scripting) can be used in the format string, e.g., $meta\_sep(artist,\\\\)

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_[View the full topic](https://community.mp3tag.de/t/copy-tlen-to-length/63900)._