It is possible to change the width of the blocks in a template with the D&D editor?
You control this in your block settings in the right panel under Structure.
This feature is currently available in the paid versions only. But don;t worry, it will become available for the free version any time soon.
I saw this feature in 6.11, but I want to change the width of the whole newsletter. Is that possible?
It's currently not possible to change the with of the mail body.
I'd like to be able to set the max width of the mail body using the drag & drop editor. Hopefully we'll see this feature soon.
This is a bit disappointing... I guess, I need to back to Acymailing 5 or even to a different system.
you can read more about it here
...And, I added a (title) "580px $global-width setting" Feature Request,
Please, look for it in the Feature Request section and vote it, Thanks!