Info Catalog ediff: Highlighting Difference Regions ediff: Customization ediff: Refinement of Difference Regions

ediff: Narrowing

 
 7.6 Narrowing
 =============
 
 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.
 

Info Catalog ediff: Highlighting Difference Regions ediff: Customization ediff: Refinement of Difference Regions