When viewing the Plan Grid, or a Draft Folder, tap on a post thumbnail to access the Schedule Editor.
In the Schedule Editor view, various options are available to apply to a specific post.
Crop Tool: Adjust the media to different dimensions (with auto-post eligible sizing)
Preview Tool: Save or Swap media (image or video) for a post
Hashtag Manager: Select a hashtag group to input directly into the post caption
Now that you know how to add, and edit content, simply schedule the post to be published to your Social Media account.