Mailchimp have introduced a new image editor. Once you’ve uploaded your images to the Mailchimp Content Manager you’ll be able to edit your images using the new image editor. The new image editor is very powerful and has many new features.
Update: This post is outdated. Please see the latest instructions on how to resize images in Mailchimp.
A questions I’ve been asked many times over the past few days is to to use the new auto-resize function. The auto-resize functionality as at the time of publishing this article is a temporary solution. The video below describes how to use the new auto-resize feature for images. Of note is to remember to click the blue check-mark in the image and to click save before closing the image editor.
Note: You’ll know you need to auto-resize if you see the following message in Mailchimp: