The editor is quite basic and does not have any formatting options for fonts, or images. The only option offered it the size of the images that would be uploaded to the post, but you cannot decide where in the post these images will be located.
I had after all to edit the post on the web interface to get some space between images and add the link.
Check the screenshots I've been taking while writting this preview.
You can download it here from the AppStore. The best thing: it is free!