# Action Groups
**URL:** https://community.mp3tag.de/t/action-groups/12395
**Category:** Support
**Created:** [August 15, 2011, 3:06pm UTC](https://community.mp3tag.de/t/action-groups/12395 "2011-08-15T15:06:54Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@ontherun](https://community.mp3tag.de/u/ontherun)
#### Post date: [August 15, 2011, 3:06pm UTC](https://community.mp3tag.de/t/action-groups/12395/1 "2011-08-15T15:06:54Z")
I looked all over the forum to locate a way that case converstion would change case'S to case's.
Or any word that has a 'L (capital letter at the end of a word) (wasn't he's that's)
Any help will help
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### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [August 15, 2011, 3:18pm UTC](https://community.mp3tag.de/t/action-groups/12395/2 "2011-08-15T15:18:27Z")
> [@DB Cooper](#):
>
> ... case converstion would change case'S to case's.
create yourself an action of the type case conversion (see FAQs [/t/967/1](https://community.mp3tag.de/t/967/1) on how to create an action)
and then follow the FAQs on how to create an action to modify cases.
[/t/967/1](https://community.mp3tag.de/t/967/1)
Whe creating such a case-conversion-action you can specify which characters delimit words - if you leave out the ' then the ' would be treated as any other character and would not cause a case-change behind it.
Concerning your signature: shouldn't "we have lost and missed placed along the way" be "we have lost and misplaced along the way"?
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### Author:  [@DetlevD](https://community.mp3tag.de/u/DetlevD)
#### Post date: [August 15, 2011, 3:32pm UTC](https://community.mp3tag.de/t/action-groups/12395/3 "2011-08-15T15:32:04Z")
> [@DB Cooper](#):
>
> I looked all over the forum to locate a way that case converstion would change case'S to case's.
> Or any word that has a 'L (capital letter at the end of a word) (wasn't he's that's)
>
> Any help will help
Here is an example of five possibilities to change the casing anyway using Mp3tag functions.
Pick the one you need.
For demonstration only I use the preview feature of the Converter 'Tag - Filename'.
Converter: Tag-Filename [Alt]-[1]
Formatstring:
**$caps('case''''S')' -- '$caps2('case''''S')' -- '$caps3('case''''S')' -- '$lower('case''''S')' -- '$regexp('case''''S','\L+\\>','\L$0')**
Result:
Case's -- Case'S -- Case's -- case's -- case's
Same thing with another test string ....
Converter: Tag-Filename [Alt]-[1]
Formatstring:
**$caps('It''''S a case''''S case')' -- '$caps2('It''''S a case''''S case')' -- '$caps3('It''''S a case''''S case')' -- '$lower('It''''S a case''''S case')' -- '$regexp('It''''S a case''''S case','\L+\\>','\L$0')**
Result:
It's A Case's Case -- It'S A Case'S Case -- It's a case's case -- it's a case's case -- It's a case's case
Modified example using regexp ....
Converter: Tag-Filename [Alt]-[1]
Formatstring:
**$regexp('It''''S A case''''S case','\L+\\>','\L$0')' -- '$regexp('It''''S A case''''S case','''\L+?\\>','\L$0')**
Result:
It's a case's case -- It's A case's case
DD.20110815.2015.CEST
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### Author:  [@system](https://community.mp3tag.de/u/system)
#### Post date: [February 9, 2026, 12:23pm UTC](https://community.mp3tag.de/t/action-groups/12395/4 "2026-02-09T12:23:16Z")