(lemacs.info)Mark and Region

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The Mark and the Region

   The concept of the mark applies to the calendar just as to any other
buffer, but it marks a *date*, not a *position* in the buffer.  The
region consists of the days between the mark and point (including the
starting and stopping dates).

     Set the mark to today's date (`calendar-set-mark').

     The same.

`C-x C-x'
     Interchange mark and point (`calendar-exchange-point-and-mark').

     Display the number of days in the current region

   You set the mark in the calendar, as in any other buffer, by using
`C-@' or `C-SPC' (`calendar-set-mark').  You return to the marked date
with the command `C-x C-x' (`calendar-exchange-point-and-mark') which
puts the mark where point was and point where mark was.  The calendar
is scrolled as necessary, if the marked date was not visible on the
screen.  This does not change the extent of the region.

   To determine the number of days in the region, type `M-='
(`calendar-count-days-region').  The numbers of days printed is
*inclusive*, that is, includes the days specified by mark and point.

   The main use of the mark in the calendar is to remember dates that
you may want to go back to.  To make this feature more useful, the mark
ring (Note: Mark Ring.) operates exactly as in other buffers:  Emacs
remembers 16 previous locations of the mark.  To return to a marked
date, type `C-u C-SPC' (or `C-u C-@'); this is the command
`calendar-set-mark' given a numeric argument.  It moves point to where
the mark was, restores the mark from the ring of former marks, and
stores the previous point at the end of the mark ring.  So, repeated
use of this command moves point through all the old marks on the ring,
one by one.

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