I would like to know how to do this as well. When I lay out my newsletter, I may have to move a piece up or down to make the newsletter flow better. For example, I have one content piece that contains text & a centred button & then more text (thus 3 blocks). To move them, I have to move them separately to the new location. i haven't found a way to choose the 3 blocks and move them together within my newsletter.
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