From now on you can edit your uploaded HTML emails in a WYSIWYG editor using Drag&Drop or HTML upload editor.
How to do it?
If you click into the HTML you uploaded, on the right slider bar you will see a new button appear: “EDIT WITH WYSIWYG”. Just click it and you can edit it right away: changing merge tags or rewrite texts.
IMPORTANT: don’t make big changes as this type of editing might ruin your email design.