Does anyone know how to enable the image icon in the Rich Text Editor , full screen mode , on AEM 6.4 ?
Thank you for your time and expertise.
If you are using the latest Core Text component, you could edit the Template of the page and then edit the Policy of the Text component and check the Feature 'Show inserted image modification options' under Plugins
Check  to read about the image plugin and  on how to activate the plugin.
 Configure the Rich Text Editor
 Configure the Rich Text Editor plug-ins