Consider creating a new Custom component.

Please note that the RTE plugin I have published [1] was tested on 6.3, and may not work on 6.5, but this article [1] can be used to create a new plugin and the concept is the same. I will try to update the plugin. [1] https://mkbansal.wordpress.com/2016/01/09/aem-rte-custom-styles-plugin-touch-ui/

Make sure you are following correct runmode structure as per [1]. Please be informed that runmodes on cloud are supported in json format [2]. [1] https://experienceleague.adobe.com/docs/experience-manager-cloud-service/content/implementing/deploying/overview.html?lang=en#runmodes[2] https://experien...