# Data Types Settings

Allows you to configure the behavior of data types.

```json
{
  "Umbraco": {
    "CMS": {
      "DataTypes": {
        "CanBeChanged": "True"
      }
    }
  }
}
```

## CanBeChanged

Gets or sets a value indicating if data types can be changed after they've been used.

Valid values:

* `"True"`
  * Allows data types to be changed after creation. This can lead to data on content is not valid on the Data Type.
* `"False"`
  * Disallow Data Type changes. (Recommended value, unless you really know what you are doing)
* `"FalseWithHelpText"`
  * Disallow Data Type changes, but show the users a help text so they understand why.


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