Any post on the Tumblr microblogging site can be set to "Private," including your reblogs of other content. Private posts are only visible to you and any other members or administrators of your blog, which makes private posts and reblogs an effective collaboration tool to build team knowledge around a topic or project.
Reblogs for Your Eyes Only
The private reblogging process starts the same way as public reblogging: locate the content you want to reblog, and then click the double-arrow reblog icon -- or select “Reblog” if you’re on a post’s page. After you edit the content to get it just right, select “Private” from the post's drop-down menu, and then click the newly shown “Create private post” button.
Normal reblogs send notifications to the original poster and add your name to a list of rebloggers underneath a post on that post’s page. Private posts, however, don’t send the original poster a dashboard notification or add your Tumblr name to the reblog list.
You cannot reblog or share private posts through the platform. You can only access these posts through their direct URL or within the Tumblr dashboard for the blog, and only if you are the blog owner or an administrator. Private posts do not feature the reblog button, nor is there an option to reblog or share it on the Tumblr dashboard.
Team Member Views
Secondary blogs -- those you create after your first blog -- can have multiple users who are able to see private posts. Tumblr allows you to set admins who have full control over posts and can invite new users. You can also invite users as members of your blog, but they only have a right to post content and edit the content they post. These users can see private posts directly on your blog and through the URLs provided in the dashboard.
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