While creating a Blast, you can preview it to see what it will look like on both Desktop and Mobile views. Previewing on Mobile is very important because the Mobile view might change the layout and format of your Blast, so you will want to make sure your Blast looks correct on both platforms.
To preview a drafted Blast, open the Blast you are working on > click Preview (located above the Blast Editor). The pop-up will allow you to preview your Blast on Desktop and Mobile by clicking on the view you would like to see.
PLEASE NOTE: Previewing a Blast is not a substitute for sending samples. Samples are very important because they give you a look into how your Blast will display in an actual email client. Your Blast might look correct on Gmail and not correct on Outlook. We highly recommend sending samples before sending out your Blast. If you are having trouble with your emails in Outlook, check out this article.