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copied!<p>You didn't explicitly state emacs, but since you've highlighted lots of editors...</p> <p>In emacs, you can use rectangles for this, where a column is a rectangle of width 1.</p> <p>To create a rectangle, mark the top-left and bottom-right of the rectangle (where the bottom-right mark is one to the right of the further right point included in the rectangle. You can then manipulate via:</p> <p><code>C-x r k</code><br> Kill the text of the region-rectangle, saving its contents as the "last killed rectangle" (<code>kill-rectangle</code>).</p> <p><code>C-x r d</code><br> Delete the text of the region-rectangle (<code>delete-rectangle</code>).</p> <p><code>C-x r y</code><br> Yank the last killed rectangle with its upper left corner at point (<code>yank-rectangle</code>).</p> <p><code>C-x r o</code><br> Insert blank space to fill the space of the region-rectangle (<code>open-rectangle</code>). This pushes the previous contents of the region-rectangle rightward.</p> <p><code>M-x clear-rectangle</code><br> Clear the region-rectangle by replacing its contents with spaces.</p> <p><code>M-x delete-whitespace-rectangle</code><br> Delete whitespace in each of the lines on the specified rectangle, starting from the left edge column of the rectangle.</p> <p><code>C-x r t string RET</code><br> Replace rectangle contents with string on each line. (<code>string-rectangle</code>).</p> <p><code>M-x string-insert-rectangle RET string RET</code><br> Insert string on each line of the rectangle.</p>

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