If you have existing posts that you want to edit the content/formatting/images please follow this tutorial.
Step 1
Click the CONTENT tab on the primary navigation menu
Step 2
Click the POST tab from the grey horiztonal menu
Step 3
You will now see all your existing posts. You can edit current posts by clicking the pencil to the right-hand column.
Step 4
You can now edit the content of the current post. When you are finished scroll down to the bottom and click the "Edit Post". This will publish the latest version of your post on your website. View your live site and see the changes.