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If buffers being compared are narrowed at the time of invocation of
Ediff, ediff-buffers
will preserve the narrowing range. However,
if ediff-files
is invoked on the files visited by these buffers,
that would widen the buffers, since this command is defined to compare the
entire files.
Calling ediff-regions-linewise
or ediff-windows-linewise
, or
the corresponding ‘-wordwise’ commands, narrows the variants to the
particular regions being compared. The original accessible ranges are
restored when you quit Ediff. During the command, you can toggle this
narrowing on and off with the % command.
These two variables control this narrowing behavior:
ediff-start-narrowed
¶If t
, Ediff narrows the display to the appropriate range when it
is invoked with an ‘ediff-regions…’ or
‘ediff-windows…’ command. If nil
, these commands do
not automatically narrow, but you can still toggle narrowing on and off
by typing %.
ediff-quit-widened
¶Controls whether on quitting Ediff should restore the accessible range that existed before the current invocation.