If you're trying to add your logo to your account to fulfill some automated campaign creation elements, I'd recommend following along with this article.
For instructions on inserting an image into an email campaign, please see this article.
If there's another campaign type, or if you're adding the logo to a form, you can search in our Knowledge Base for how to add images or create the thing you're trying to add to. The KB is also available via the Help button within your account, in the top navigation bar.
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