Absolutely! Out of the box, a lot of our new email section types are responsive, which means they will automatically adjust to mobile devices. For example, your email, when viewed on a mobile device stacks vertically instead of horizontally as it would on the desktop.
Once in the editor, you can actually simulate different device types and see how your emails will look to your email recipients. In the lower right corner of the editor, you'll see this triangle:
Once clicked, it expands to expose controls that let you see your email as it would appear on different devices:
Also, keep an eye on the section settings which allow you to control, in detail, how your content adjusts to different devices. You also have the option to hide certain elements if desired.
Previewing your layout on different devices is powerful when creating your email. However, we also recommend sending yourself a test email to see exactly what your email will look like for your email recipients (Just to be on the safe side).