Is this a Campaign Standard issue? If so this is actually posted in the wrong forum. As far as I am aware the only legacy editor exists in ACS.
Additionally, as the ACS legacy editor is deprecated and plans to be removed by the end of this year, I would recommend converting your emails and templates over to the dynamic content editor versus continuing to use the legacy editor.
Is this a Campaign Standard issue? If so this is actually posted in the wrong forum. As far as I am aware the only legacy editor exists in ACS.
Additionally, as the ACS legacy editor is deprecated and plans to be removed by the end of this year, I would recommend converting your emails and templates over to the dynamic content editor versus continuing to use the legacy editor.