Fill mode

Filling splits lines so that they aren't longer than a certain number of characters. The fill-mode checks if you have passed this threshold when you type the SPC or RET key. Any words passed the threshold get moved to the next line.

Ctrl-x f

Sets the fill-column variable (see below) to the cursor's current column position.

Command: fill-mode

Toggles the auto-filling minor mode.

Variable: fill-column

The maximum number of characters allowed in a single line. This is used by the filling and centring functions.

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