When creating a post or page on your WordPress.com blog, you have two editing modes available to you, depending on which you are most comfortable with.
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 Text editor has fewer options, but allows you to write your posts in HTML. This editing mode is aimed at users who are comfortable working with HTML. When you need to add a shortcode, add some font style, or paste in code from an outside source, you can use the Text editor.
Switching between the Visual and Text editing modes is easy. Just use the tabs directly above the right side of the editing area.
Resizing the Editor
The text editor will intelligently resize to fit the content of your post.