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25.6 Filling Text

Filling text means breaking it up into lines that fit a specified width. Emacs does filling in two ways. In Auto Fill mode, inserting text with self-inserting characters also automatically fills it. There are also explicit fill commands that you can use when editing text.

Auto Fill  Auto Fill mode breaks long lines automatically.
Fill Commands  Commands to refill paragraphs and center lines.
Fill Prefix  Filling paragraphs that are indented or in a comment, etc.
Adaptive Fill  How Emacs can determine the fill prefix automatically.