I am using Moodle 3.0+ with Academia theme. All settings are okay at my end.
Plugins -> Manage editors - > TinyMCE HTML editor is on firs and Atto HTML editor on second.
User -> Preference -> Editor Preference -> TinyMCE HTML editor is selected as well.
All screen such as forum discussion showing the TinyMCE HTML editor with toolbars and all icons
BUT WHEN I OPEN UP MESSAGE SCREEN IT DOESN'T SHOW HTML EDITOR.
Kindly suggest the way out. Screenshot is attached.