You are actually using Zenpage plugin pages. There is an editor with buttons called TinyMCE.
"Font manipulation" is not possible without creating a custom config file for that editor.
http://www.zenphoto.org/news/how-to-create-custom-tinymce-configurations
I would not really recommend as you can easily "destroy" the look of a site.
For embedding images there are two ways:
http://www.zenphoto.org/news/using-zenpage#how-do-i-get-images-into-my-pages-or-news-articles