# renaming folders
**URL:** https://community.mp3tag.de/t/renaming-folders/10068
**Category:** General Discussion
**Created:** [March 9, 2010, 9:37pm UTC](https://community.mp3tag.de/t/renaming-folders/10068 "2010-03-09T21:37:52Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@pone](https://community.mp3tag.de/u/pone)
#### Post date: [March 9, 2010, 9:37pm UTC](https://community.mp3tag.de/t/renaming-folders/10068/1 "2010-03-09T21:37:52Z")
for renaming folder i use the following action:
action \> format value \> field: \_DIRECTORY
works perfect, of course.
just one little problem with characters which are not supported in folder and file names:
/ \ \< \> : \* | ? "
mp3tag treats them as if there was no character at all, it just omits them.
is there a way to get an underscore \_ instead of the special characters in the folder names?
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### Author:  [@stanman](https://community.mp3tag.de/u/stanman)
#### Post date: [March 10, 2010, 2:19am UTC](https://community.mp3tag.de/t/renaming-folders/10068/2 "2010-03-10T02:19:48Z")
This what I use for filenames, it replaces special characters with an underscore:
$validate(%artist% - %track% - %title%,\_)
You should be able to modify it for folders.
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### Author:  [@pone](https://community.mp3tag.de/u/pone)
#### Post date: [March 10, 2010, 12:42pm UTC](https://community.mp3tag.de/t/renaming-folders/10068/3 "2010-03-10T12:42:56Z")
Thanks, works perfectly.
I had to place
$validate(
in front of the existing renaming actions and
,\_)
after it. Easy. Thanks.
That raises another question:
Is there any place in the forum or help page where I can look up all existing commands like this? Never heard of $vailidate(s,\_) before. Where can I look up those tricks? They appear in the forum all the time, but is there no place where all those little action commands are collected?
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### Author:  [@pone](https://community.mp3tag.de/u/pone)
#### Post date: [March 10, 2010, 12:58pm UTC](https://community.mp3tag.de/t/renaming-folders/10068/4 "2010-03-10T12:58:52Z")
ok, found it myself:
[https://docs.mp3tag.de/scripting](https://docs.mp3tag.de/scripting)
first search, then ask.
i know...