It is recommended to add plug-ins via the editor from the 'Customize Page Code' section. The editor can be found by following these steps:
1. Edit the Adobe Analytics tool
2. Expand the Customize Page Code section
3. Click open editor
When adding plug-ins to the code, keep in mind some plug-ins are not supported in the AppMeasurement library. Code hosted by Adobe DTM is AppMeasurement 1.4.4 and up. To determine which version of the code is implemented, edit the Analytics tool and expand the Library Management section. For custom code, the version can be found in the top of the s_code.js file, or at the top of the Digital Pulse Debugger.
For a list of plug-ins supported in AppMeasurement reference the plug-in list here: https://marketing.adobe.com/resources/help/en_US/sc/implement/plugins_support.html.
For a list of plug-ins supported in H Code, reference the plug-in list here: https://marketing.adobe.com/resources/help/en_US/sc/implement/impl_plugins.html