This learning unit covers editing the Body of a node.
The Body field is usually, but not always, for the main content of a page (node). It can contain text, images, and links to web pages (internal and external) and uploaded documents.
The rich-text editor can be used to edit and format the field's content much like a word processor. For more details about how to use the rich-text editor, including how to add images and links, see the learning unit on Using the rich-text editor.
Just above the Body field there is a Show summary in full view option, enabled (checked) by default. This setting has to do with teasers, which are discussed more fully in the learning unit on Teasers.