In addition to sending a campaign directly, I send the email link that is created for that campaign to handful of people. It's not something I want them to share, so I wonder if it's possible to disable/delete the feature/portion of the document they see at the upper left (see screenshot below) when they clink the link to the campaign.
Hi John. At this time, there is no way to disable that share option in the web page version of the email. We will track your feedback and keep it in mind for future updates.