code:

clear-rectangle               C-x r c
   Blank out the region-rectangle.
close-rectangle               M-x ... RET
   Delete all whitespace following a specified column in each line.
copy-rectangle-to-register    C-x r r
   Copy rectangular region into register REGISTER.
delete-rectangle              C-x r d
   Delete (don't save) text in the region-rectangle.
delete-whitespace-rectangle   M-x ... RET
   Delete all whitespace following a specified column in each line.
delimit-columns-rectangle     M-x ... RET
   Prettify all columns in a text rectangle.
kill-rectangle                C-x r k
   Delete the region-rectangle and save it as the last killed one.
open-rectangle                C-x r o
   Blank out the region-rectangle, shifting text right.
replace-rectangle             M-x ... RET
   Replace rectangle contents with STRING on each line.
string-insert-rectangle       M-x ... RET
   Insert STRING on each line of region-rectangle, shifting text right.
string-rectangle              C-x r t
   Replace rectangle contents with STRING on each line.
yank-rectangle                C-x r y
   Yank the last killed rectangle with upper left corner at point.
  

В ответ на:

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В Emacs: code:
clear-rectangle C-x r c
   Blank out the region-rectangle.
close-rectangle M-x ... RET
   Delete all whitespace following a specified column in each line.
copy-rectangle-to-register C-x r r
   Copy rectangular region into register REGISTER.
delete-rectangle C-x r d
   Delete (don't save) text in the region-rectangle.
delete-whitespace-rectangle M-x ... RET
   Delete all whitespace following a specified column in each line.
delimit-columns-rectangle M-x ... RET
   Prettify all columns in a text rectangle.
kill-rectangle C-x r k
   Delete the region-rectangle and save it as the last killed one.
open-rectangle C-x r o
   Blank out the region-rectangle, shifting text right.
replace-rectangle M-x ... RET
   Replace rectangle contents with STRING on each line.
string-insert-rectangle M-x ... RET
   Insert STRING on each line of region-rectangle, shifting text right.
string-rectangle C-x r t
   Replace rectangle contents with STRING on each line.
yank-rectangle C-x r y
   Yank the last killed rectangle with upper left corner at point.

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В ответ на:

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еще проще
обычное выделение - левой кнопкой мыши, прямоугольное выделение - точно так же токо средней кнопкой мыши

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В ответ на:

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Это сложно: нужно искать мышь в куче хлама на правой половине стола

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