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You are currently using a (micro-) emacs like text editor. Almost
all of its commands are available via the following control keys:
     F1                                                      F9
  +------+------+------+------+------+------+------+------+------+
  |sback |sprev |snext |sforw |srepl |qrepl | insf |savef | dell |
  +------+------+------+------+------+------+------+------+------+
  +------+------+
  | quit |repeat|  <- Stop(L1), Again(L2) 
  +------+------+                           +------+------+------+
  |addmod| abort|                           | ---  |  bol | eol  |
  +------+------+                           +------+------+------+
  |delmod| copy |          Home(R7), ... -> | bof  |  /\  | pgup |
  +------+------+                           +------+------+------+
  | mark | paste|                           |  <   |maxwin|  >   |
  +------+------+                           +------+------+------+
  | swap | cut  |                           | eof  |  \/  | pgdn |
  +------+------+                           +------+------+------+
  |    help     |                            (SHIFT-DEL = forwdel)
  +-------------+                            (SHIFT-TAB = realtab)
 
Use quit (Stop) = SHIFT-RET = TAB or CTLX-CTRL-c to terminate input
(in the normal case) and use abort (Undo) = SHIFT-ESC to abort (and
to discard any text modifications).  Furthermore, the micro-emacs
editing modes "w(rap)" around, "e(xact)" search, "v(iew)" readonly,
and "o(ver)" write and the following key bindings are supported:

  CTRL-a (gotobol)     META-l (lowerw)      CTRL-e (gotoeol)
  CTRL-v (forwpage)    META-u (upperw)      CTRL-z (backpage)
  CTRL-n (forwline)    CTRL-o (openline)    CTRL-p (backline)
  CTRL-f (forwchar)    META-g (gotoline)    CTRL-b (backchar)
  CTRL-d (forwdel)     CTRL-k (delline)     CTRL-h (backdel)
  CTRL-s (searchforw)  CTRL-% (sreplace)    CTRL-r (searchback)
  CTRL-w (cut)         META-w (copy)        CTRL-y (paste)
  CTRL-SPACE (mark)    META-z (quit)        CTLX,CTRL-x (swap)  
  META-< (gotobof)     CTLX,CTRL-w (savef)  META-> (gotoeof)
  META-f (forwword)    CTLX,CTRL-i (insf)   META-b (backword)
  META-d (fdelword)    META-c (capword)     META-h (bdelword)
  META-s (searchnext)  META-% (qreplace)    META-r (searchprev)
