How does the new products email content work?
You can add a block of new products to an email trigger using the *Add Content* feature.
Once you've done that, there will be a block of new products in the email preview. You can click on that to edit the block. You can edit the title as well as the number of products that will show up.
Lastly, you can configure the number of days back that new products are determined. By default, products created in the last 90 days will be used, if they are active and in stock, and they'll be listed in the order of creation date (newest first).