Next: Insert in Picture, Previous: Picture, Up: Picture
Most keys do the same thing in Picture mode that they usually do, but
do it in a quarter-plane style. For example, C-f is rebound to
run picture-forward-column
, a command which moves point one
column to the right, inserting a space if necessary so that the actual
end of the line makes no difference. C-b is rebound to run
picture-backward-column
, which always moves point left one
column, converting a tab to multiple spaces if necessary. C-n and
C-p are rebound to run picture-move-down
and
picture-move-up
, which can either insert spaces or convert tabs
as necessary to make sure that point stays in exactly the same column.
C-e runs picture-end-of-line
, which moves to after the last
nonblank character on the line. There is no need to change C-a,
as the choice of screen model does not affect beginnings of
lines.
Insertion of text is adapted to the quarter-plane screen model through
the use of Overwrite mode (see Minor Modes). Self-inserting characters
replace existing text, column by column, rather than pushing existing text
to the right. <RET> runs picture-newline
, which just moves to
the beginning of the following line so that new text will replace that
line.
Picture mode provides erasure instead of deletion and killing of
text. <DEL> (picture-backward-clear-column
) replaces the
preceding character with a space rather than removing it; this moves
point backwards. C-d (picture-clear-column
) replaces the
next character or characters with spaces, but does not move point. (If
you want to clear characters to spaces and move forward over them, use
<SPC>.) C-k (picture-clear-line
) really kills the
contents of lines, but does not delete the newlines from the
buffer.
To do actual insertion, you must use special commands. C-o
(picture-open-line
) creates a blank line after the current line;
it never splits a line. C-M-o (split-line
) makes sense in
Picture mode, so it is not changed. C-j
(picture-duplicate-line
) inserts below the current line another
line with the same contents.
To do actual deletion in Picture mode, use C-w, C-c C-d
(which is defined as delete-char
, as C-d is in other
modes), or one of the picture rectangle commands (see Rectangles in Picture).