Function: picture-mode

Switch to Picture mode, in which a quarter-plane screen model is used.

Uses keymap `picture-mode-map', which is not currently defined.

Printing characters replace instead of inserting themselves with motion
afterwards settable by these commands:

Move left after insertion: M-x picture-movement-left
Move right after insertion: M-x picture-movement-right
Move up after insertion: M-x picture-movement-up
Move down after insertion: M-x picture-movement-down

Move northwest (nw) after insertion: M-x picture-movement-nw
Move northeast (ne) after insertion: M-x picture-movement-ne
Move southwest (sw) after insertion: M-x picture-movement-sw
Move southeast (se) after insertion: M-x picture-movement-se

Move westnorthwest (wnw) after insertion: C-u M-x picture-movement-nw
Move eastnortheast (ene) after insertion: C-u M-x picture-movement-ne
Move westsouthwest (wsw) after insertion: C-u M-x picture-movement-sw
Move eastsoutheast (ese) after insertion: C-u M-x picture-movement-se

The current direction is displayed in the mode line. The initial
direction is right. Whitespace is inserted and tabs are changed to
spaces when required by movement. You can move around in the buffer
with these commands:

Move vertically to SAME column in previous line: M-x picture-move-down
Move vertically to SAME column in next line: M-x picture-move-up
Move to column following last
non-whitespace character: M-x picture-end-of-line
Move right, inserting spaces if required: M-x picture-forward-column
Move left changing tabs to spaces if required: M-x picture-backward-column
Move in direction of current picture motion: M-x picture-motion
Move opposite to current picture motion: M-x picture-motion-reverse
Move to beginning of next line: C-n

You can edit tabular text with these commands:

Move to column beneath (or at) next interesting
character (see variable `picture-tab-chars'): M-x picture-tab-search
Move to next stop in tab stop list: M-x picture-tab
Set tab stops according to context of this line: M-x picture-set-tab-stops
(With ARG, resets tab stops to default value.)
Change the tab stop list: M-x edit-tab-stops

You can manipulate text with these commands:
Clear ARG columns after point without moving: M-x picture-clear-column
Delete char at point: M-x picture-delete-char
Clear ARG columns backward: M-x picture-backward-clear-column
Clear ARG lines, advancing over them: M-x picture-clear-line
(the cleared text is saved in the kill ring)
Open blank line(s) beneath current line: M-x picture-open-line

You can manipulate rectangles with these commands:
Clear a rectangle and save it: M-x picture-clear-rectangle
Clear a rectangle, saving in a named register: M-x picture-clear-rectangle-to-register
Insert currently saved rectangle at point: M-x picture-yank-rectangle
Insert rectangle from named register: M-x picture-yank-rectangle-from-register
Draw a rectangular box around mark and point: M-x picture-draw-rectangle
Copies a rectangle to a register: C-x r r
Undo effects of rectangle overlay commands: C-x u

You can return to the previous mode with M-x picture-mode-exit, which
also strips trailing whitespace from every line. Stripping is suppressed by supplying an argument. Entry to this mode calls the value of `picture-mode-hook' if non-nil. Note that Picture mode commands will work outside of Picture mode, but they are not by default assigned to keys. (fn)