When creating a post or page on your WordPress.com blog, you have two editing modes available to you.
Powered by TinyMCE, the Visual Editor is the default mode for WordPress.com blogs and looks very similar to a word processor. The visual editor icons allow you to format text, change font alignment, insert bulleted and numbered lists, and more.
The HTML editor allows you to write your posts in HTML or edit a post’s HTML. When you need to add a shortcode, add some font style, or paste in code from an outside source, you can use the HTML editor.
To switch between the Visual and HTML editing modes is easy, use the tabs at the upper-right corner of the post editing area.
Resizing the Editor
The text editor will intelligently resize to fit the content of your post.