basic

http://www.gnu.org/software/emacs/manual/html_node/emacs/Deletion.html

<DEL>
<Backspace>
Delete the previous character, or the text in the region if it is active (delete-backward-char).

<Delete>
Delete the next character, or the text in the region if it is active (delete-forward-char).

C-d
Delete the next character (delete-char).

M-\
Delete spaces and tabs around point (delete-horizontal-space).

M-<SPC>
Delete spaces and tabs around point, leaving one space (just-one-space).

C-x C-o
Delete blank lines around the current line (delete-blank-lines).

M-^
Join two lines by deleting the intervening newline, along with any indentation following it (delete-indentation).

delete系

delete whitespace

http://www.emacswiki.org/emacs/DeletingWhitespace

redo / undo

undo

• C-_
• C-/
• C-x u