Learning Emacs II

10 Sep 2022

Chapter 02

All about EDITING.

Text filling and reformatting

I want to know what happened if I enable the auto-fill mode. It seems
that... Oh! It helps me split the long sentence automatically!
Amazing! Oh! Again, it does the same thing once more. Now I want to
stop this mode. I should type "M-x auto-fill-mode" to disable the
minor mode. Now the auto-fill mode has been disabled.

Some commands

Keystrokes	Command name	Action
(none)	refill-mode	Toggle refill mode, inwhich Emacs automatically refromats text.
(none)		Toggle auto-fill mode, in which Emacs formats paragraphs as you type them.
M-q	fill-paragraph	Reformat paragraph.
(none)	fill-region	Reformat individual paragraphs within a region.

If I type a suuuuuuuper long sentence and don't make line-split manually, then type "M-q", what will happened?

If I type a suuuuuuuper long sentence and don't make line-split
manually, then type "M-q", what will happened?

The result is the sentence is reformatted.

If I type a suuuuuuuper long sentence and don't make line-split manually, select the latter part and type "M-x fill-region", what will happened?

If I type a suuuuuuuper long sentence and don't make line-split manually, select
the latter part and type "M-x fill-region", what will happened?

The result is the part being selected is reformatted.

Cursor movement commands

Keystrokes	Command name	Action
C-f	forward-char	Move forward one character(right).
C-b	backward-char	Move backward one character(left).
C-p	previous-line	Move to previous line(up).
C-n	next-line	Move to next line(down).
M-f	forward-word	Move one word forward.
M-b	backward-word	Move one word backward.
C-l	recenter	Redraw screen with current line in the center.
M-n	digit-argument	Repeat the next command n times.
C-u n	universal-argument	Repeat the next command n times(four times if you omit n).

(I don’t want to master all the commands mentioned in the book.)

Deleting, killing and yanking text

Keystrokes	Command name	Action
C-d	delete-char	Delete character under cursor.
Del	delete-backward-char	Delete previous character.
M-d	kill-word	Delete next word.
M-Del	backward-kill-word	Delete previous word.
C-k	kill-line	Delete from cursor to end of line.
M-k	kill-sentence	Delete next sentence.
C-x Del	backward-kill-sentence	Delete previous sentence.
C-y	yank	Restore what you’ve deleted.a
C-w	kill-region	Delete a markedregion	n
(none)	kill-paragraph	Delete next paragraph
(none)	backward-kill-paragraph	Delete previous paragraph

Commands for working with regions

Keystrokes	Command name	Action
C-@ or C-Space	set-mark-command	Mark the beginning(or end) of a region
C-x C-x	exchange-point-and-mark	Exchange location of cursor and mark.
C-w	kill-region	Delete the region.
C-y	yank	Paste most recently killed or copied
M-w	Kill-ring-save	Copy the region(so it can be pasted with C-y).
M-h	mark-paragraph	Mark paragraph.
C-x C-p	mark-page	Mark page.
C-x h	mark-whole-buffer	Mark buffer.
M-y	yank-pop	After C-y, pastes earlier deletion.

Transposition commands

Keystrokes	Command name	Action
C-t	transpose-chars	Transpose two letters.
M-t	transpose-words	Transpose two words.
C-x C-t	transpose-lines	Transpose two lines.
(none)	transpose-sentences	Transpose two Sentences
(none)	transpose-paragraphs	Transpose two Paragraphs

Capitalization commands

Keystrokes	Command name	Action
M-c	capitalize-word	Capitalizefirst letter of word.
M-u	upcase-word	Uppercase word.
M-l	downcase-word	Downcase word.
Meta - M-c	negative-argument;capitalize-word	Capitalize previous word.
Meta - M-u	negative-argument;upcase-word	Uppercase previous word.
Meta - M-l	negative-argument;downcase-word	Lowercase previous word.

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Learning Emacs II

Chapter 02

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