(xemacs.info)ForIndent Commands

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21.13.2.1 Fortran Indentation Commands
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`<TAB>'
     Indent the current line (`fortran-indent-line').

`M-<LFD>'
     Break the current line and set up a continuation line.

`C-M-q'
     Indent all the lines of the subprogram point is in
     (`fortran-indent-subprogram').

   <TAB> is redefined by Fortran mode to reindent the current line for
Fortran (`fortran-indent-line').  Line numbers and continuation markers
are indented to their required columns, and the body of the statement
is independently indented, based on its nesting in the program.

   The key `C-M-q' is redefined as `fortran-indent-subprogram', a
command that reindents all the lines of the Fortran subprogram
(function or subroutine) containing point.

   The key `M-<LFD>' is redefined as `fortran-split-line', a command to
split a line in the appropriate fashion for Fortran.  In a non-comment
line, the second half becomes a continuation line and is indented
accordingly.  In a comment line, both halves become separate comment
lines.