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Behaviours give you more control over fields in Jira. A field configuration customizes how fields behave, based on the issue operation screen they appear on. However, a behaviour in ScriptRunner allows you to take that field customization further, defining how fields behave for issues in a given project or issue context.

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You can create behaviours to:

• Prefill/preformat a template for the Description field for template for users to follow when an issue is created.

• Make a custom field read-only depending on the workflow state.

• Dynamically make calls to external data sources based on user selections when an issue is created.

• Hide a custom field depending on the workflow state, or the on the value of another custom field.

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