vip: Marking

 
 1.4.6 Marking
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 Typing an ‘m’ followed by a lower-case character CH marks the point to
 the register named CH as in Vi.  In addition to these, we have following
 key bindings for marking.
 
 ‘m <’
      Set mark at the beginning of buffer.
 ‘m >’
      Set mark at the end of buffer.
 ‘m .’
      Set mark at point (and push old mark on mark ring).
 ‘m ,’
      Jump to mark (and pop mark off the mark ring).