jed has built-in support for the editing of rectangular regions of text. One corner of rectangle is defined by setting the mark somewhere in the text. The Point (cursor location) defines the opposite corner of the rectangle.
Once a rectangle is defined, one may use the following functions:
kill_rect
Delete text inside the rectangle saving the rectangle
in the internal rectangle buffer.
n_rect
Push all text in the rectangle to the right outside the
rectangle.
copy_rect
Copy text inside the rectangle to the internal rectangle
buffer.
blank_rect
Replace all text inside the rectangle by spaces.
The function insert_rect inserts a previously killed or copied
rectangle into the text at the Point.
These functions have no default binding and must be entered into the
MiniBuffer by pressing ESC X to produce the M-x prompt.