# Step size when Auto numbering
**URL:** https://community.mp3tag.de/t/step-size-when-auto-numbering/19615
**Category:** General Discussion
**Created:** [December 20, 2017, 11:46am UTC](https://community.mp3tag.de/t/step-size-when-auto-numbering/19615 "2017-12-20T11:46:17Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@ruslani](https://community.mp3tag.de/u/ruslani)
#### Post date: [December 20, 2017, 11:46am UTC](https://community.mp3tag.de/t/step-size-when-auto-numbering/19615/1 "2017-12-20T11:46:17Z")
Is it possible to specify step size when auto numbering tracks?
For instance now it numbers tracks 1-2-3-4-5-6
I want to specify step size of 10 and number tracks as 10-20-30-40-50 etc.
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### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [December 20, 2017, 1:43pm UTC](https://community.mp3tag.de/t/step-size-when-auto-numbering/19615/2 "2017-12-20T13:43:23Z")
You can't with the numbering assistant.
But you can in an action of the type "Format value" for the field:
Format string: $num($mul(%\_counter%,10),2)
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### Author:  [@ruslani](https://community.mp3tag.de/u/ruslani)
#### Post date: [December 21, 2017, 3:00am UTC](https://community.mp3tag.de/t/step-size-when-auto-numbering/19615/3 "2017-12-21T03:00:47Z")
> [@ohrenkino](#):
>
> You can't with the numbering assistant.
> But you can in an action of the type "Format value" for the field:
> Format string: $num($mul(%\_counter%,10),2)
Thank you! Worked like a charm.
Still, maybe a feature suggestion, add another field in Auto Numbering wizard - "Step size"?
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### Author:  [@bestazy](https://community.mp3tag.de/u/bestazy)
#### Post date: [December 22, 2017, 11:42am UTC](https://community.mp3tag.de/t/step-size-when-auto-numbering/19615/4 "2017-12-22T11:42:50Z")
Hi!
I couldn't found relevant topic..
I'm resorting my whole music library using beets and musicbrainz picard. It's massive so it's taking forever. I spent like 4 hours just on artists that began with the letter A. After getting things right with beets, i realized that roughly half of my albums have the date parameter fomatted as (YYYY-MM-DD) and the other half as (YYYY). So I'm going through my music in musicbrainz picard and manually editing each album to format them as (YYYY).
Is there a way I could edit them all quicker? Like delete anything over 4 characters in the Date id3 parameter for a folder?
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### Author:  [@poster](https://community.mp3tag.de/u/poster)
#### Post date: [December 22, 2017, 1:31pm UTC](https://community.mp3tag.de/t/step-size-when-auto-numbering/19615/5 "2017-12-22T13:31:43Z")
> [@bestazy](#):
>
> Is there a way I could edit them all quicker? Like delete anything over 4 characters in the Date id3 parameter for a folder?
There are many ways in MP3Tag to achieve your goal, with actions or the converter.
Example for Converter:
Tag - Tag
Field: YEAR
Formnatstring: $num(%year%,4)
or
Formatstring: $left(%year%,4)
If you mark all your files that you want to change MP3Tag will do it with one click.