TinyMCE

The TinyMCE module is a rich text editor that provides site users with a familiar graphical user interface (GUI) for composing and posting text. The interface shares many similarities with applications such as Microsoft Word.
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The installation of TinyMCE or one of the other text editors [links to other editors] is crucial to site accessibility and usability, assuming that your audience is one unfamiliar with code. Without the text editor installed, the text can still be entered into the body field, but unless the writer knows html, the text will not be formatted.