.mp3`. I saw a mention in the document about "place holders", but there was no description or example that I could find. How would I perform this in mp3tag? (I do know that the delimiters would be percent signs, but I didn't want to write a madeup name between them.)
I'll get to harder example later!
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### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [February 13, 2024, 7:11pm UTC](https://community.mp3tag.de/t/moving-from-mp3-tag-studio-to-mp3tag-rename-files/63763/2 "2024-02-13T19:11:06Z")
As MP3tag is a tagging program, the filenames are not the primary target.
In fact, the best way would be to get the tag fields filled first and then rename a file with the data from the tag fields.
To get a general impression of MP3tag, see
> **[Overview – Mp3tag Documentation](https://docs.mp3tag.de/getting-started/overview/)**
>
> General description about Mp3tag, the design philosophy and the intention of this documentation. Mp3tag is the universal Tag Editor.
and then perhaps:
> **[First Steps – Mp3tag Documentation](https://docs.mp3tag.de/getting-started/first-steps/)**
>
> A collection of tasks with step-by-step instructions intended for novice users of Mp3tag. Mp3tag is the universal Tag Editor.
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### Author:  [@CNA](https://community.mp3tag.de/u/CNA)
#### Post date: [February 13, 2024, 7:35pm UTC](https://community.mp3tag.de/t/moving-from-mp3-tag-studio-to-mp3tag-rename-files/63763/3 "2024-02-13T19:35:05Z")
I am actually asking about this page:
> **[Rearrange Parts of File Names – Mp3tag Documentation](https://docs.mp3tag.de/converters/rearrange-filenames/)**
>
> Documentation on Filename to Filename, a converter to rearrange parts of file names. Mp3tag is the universal Tag Editor.
I note that there is, indeed, an example of a place holder, but I did not realize it, as it seems to differ in syntax from other items. I assumed, from the rest of the document, that the "variables" in the pattern used the % character as both opening and closing delimiters. So would I be correct using patterns like:
%1. %2 as expected name and %1 %2 as output name?
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### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [February 13, 2024, 7:37pm UTC](https://community.mp3tag.de/t/moving-from-mp3-tag-studio-to-mp3tag-rename-files/63763/4 "2024-02-13T19:37:24Z")
> [@CNA](#):
>
> So would I be correct using patterns like:
> %1. %2 as expected name and %1 %2 as output name?
Yes. Probably.
The function has a preview.
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### Author:  [@CNA](https://community.mp3tag.de/u/CNA)
#### Post date: [February 13, 2024, 7:40pm UTC](https://community.mp3tag.de/t/moving-from-mp3-tag-studio-to-mp3tag-rename-files/63763/5 "2024-02-13T19:40:08Z")
Thank you. Is there a full description of the pattern syntax? I might have missed it, but I did cover most of the documentation.
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### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [February 13, 2024, 7:44pm UTC](https://community.mp3tag.de/t/moving-from-mp3-tag-studio-to-mp3tag-rename-files/63763/6 "2024-02-13T19:44:40Z")
Which pattern do you mean?
The one to fiddle with the filename only?
That consists only of the %1..%n part.
All the other bits are described in format strings, mappings, scripting, actions.
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### Author:  [@CNA](https://community.mp3tag.de/u/CNA)
#### Post date: [February 13, 2024, 7:47pm UTC](https://community.mp3tag.de/t/moving-from-mp3-tag-studio-to-mp3tag-rename-files/63763/7 "2024-02-13T19:47:31Z")
Okay. I need to wrap my head around the differences between the two programs. Having used the old one for 15 or 20 years it will take a bit to get my fingers to type the differences.
I'm sure I'll be back.
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### Author:  [@system](https://community.mp3tag.de/u/system)
#### Post date: [March 14, 2024, 7:48pm UTC](https://community.mp3tag.de/t/moving-from-mp3-tag-studio-to-mp3tag-rename-files/63763/8 "2024-03-14T19:48:12Z")
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