$messagearea code location ?
 

I need to edit the WYSIWYG editor witdh because it's larger than my normal borders screenshot.

I checked the NEWREPLY template and if i'm correct the editor is $messagearea

Problem is where is that template, can't find any template called messagearea.

can someone point me out ...

Take a look at includes/functions_editor.php, function construct_edit_toolbar, the editor is generated within that function.

You don't need to edit a template to fix that. That is controlled under the Style Manager. You need to change the "Message Area Width (pixels)" area to a different size. Once you change the size of the message area, the rest will adapt automatically.

Thank you Rich, that did the trick:bunny: