Hello @CFSAC ,
You can edit an email's preheader in the email builder, as well as on the scheduling page, which includes simply not having text since it's an optional part of the header elements.
Any copies you make of an email will include the same header setup - including preheader, or lack thereof. If you don't want to edit your preheader each time, copy from a previously sent email / master template that you've already setup to not have one.
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