1. Identify the module that contains the custom action that you want to modify. For information on modules and customization packages, see Package Structure for Customization Artifacts, Package Structure.

2. Make the necessary updates to the action definition in the actions.xml file located at <customizationRootDirectory>/<module>/main/resources.

3. If additional artifacts like Java files are required as part of this update, add them to the module. For more information, see Adding Custom Action.

4. Deploy your action changes. For more information, see Deploying Action and Action Model Customizations.