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# Add Prefix/Postfix to Chain dialog box

This dialog box enables you to add or edit a prefix/postfix extension to the selected chain.

To access:

1. Go to Record > Recording Options > Data Format Extension > Chain Configuration node.

2. In the Chain: <Chain name> area, click the Add button .

3. Select Prefix Postfix Extension and click OK.

User interface elements are described below:

UI Element | Description
--- | ---
Case sensitive | Sets the extension to cut from the defined prefix and postfix of the string only if the letter cases match.
Display name | The name of Prefix/Postfix Extension.
Postfix to cut | The section you want to cut, from the end of the string.
Prefix to cut | The section you want to cut, from the beginning of the string.
Tag name | The unique ID of the Prefix/Postfix Extension.

## See also

- Data Format Extension > Chain Configuration Node
- Data Format Extensions
- Data Format Extension List

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