1. Find posts for any desintation(s) for which you have approval status on your MyPostings Manager's Dashboard under the "Review Posts" section within the "Pending" tab.
2. Click the little document icon to edit the post.
3. Once inside the post editor, click the Destinations tab on the top.
4. Once on the Destinations tab while editing a post (for which you have approval permissions for at least one of the destinations listed on that post), you'll see dropdowns for each "destination card" that post was sent to (for the ones you have permissions to edit).
5. Click those drop downs and set them to whatever your desired option is (pending, needs modification, not approved, unpublished, or approved). In the second screenshot provided, you can see how there are two destinations on the post. Both of its dropdowns (assuming you have approval permissions for both destinations) would each have to be individually set.
6. Once all of your selections are made, click the Submit button to save your changes and to "advance the workflow" (this means, it notifies the author they need to make additional modifications if you set a destination to that status, or it posts the post if you approved it, etc.).