Currently it's impossible to add a callout between the ordered list items, like in numbered steps in a KB article. The callout can be placed above, between or below a paragraph, but if inserted between ordered list items, it's placed at the very bottom below the last item instead. This is quite unfortunate. See https://community.hubspot.com/t5/Knowledge-Base-Tool/Inserting-callouts-between-steps-in-knowledge-base/m-p/668051#M837 for reference.
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