3.15 Filling

3.15.2 Auto-fill mode

In the default mode of operation, no filling of text takes place unless specified by using one of the commands described above. A result of this is that the user has to pressReturn at the end of each line typed to simulate filling. In Auto-Fill mode lines are broken between words at the right margin automatically as the text is being typed. Each line is broken when a space is inserted, and the text that extends past the right margin is put on the next line. The right hand margin is determined by the editor variableFill-Column.

Auto Fill Mode

Editor Command

: Arguments: None
Key sequence: None
: Switches auto-fill mode on if it is currently off, and off if it is currently on.
: With a positive prefix argument, auto-fill mode is switched on. With a negative or zero prefix argument, it is switched off. Using prefix arguments withAuto Fill Mode disregards the current state of the mode.

Auto Fill Space

Editor Command

: Arguments: None
Key sequence:SpaceMode: Auto-Fill
: Inserts a space and breaks the line between two words if the line extends beyond the right margin. A fill prefix is automatically added at the beginning of the new line if the value ofFill-Prefix is non-nil.
: WhenSpace is bound to this command in Auto-Fill mode, this key no longer invokesSelf Insert.
: A positive prefix argument causes the required number of spaces to be inserted but no line break. A prefix argument of zero causes a line break, if necessary, but no spaces are inserted.

Auto Fill Linefeed

Editor Command

: Arguments: None
Key sequence:LINEFEEDMode: Auto-Fill
: Inserts aLinefeed and aFill-Prefix (if one exists).

Auto Fill Return

Editor Command

: Arguments: None
Key sequence:ReturnMode: Auto-Fill
: The current line is broken, between two words if necessary, with no Space being inserted. This is equivalent toAuto Fill Space with a zero prefix argument, but followed by a newline.