title: Comparing CSV files in Beyond Compare 3: How to ignore/filter out lines that don't exist on right i.e. only show lines with mismatched data
body: <p>Am comparing two CSV files, one of which (the right) is mostly a sorted subset of the left file.  Am trying to see only the lines of the files with mismatching data <em>not</em> lines which exist only on the left.  I can do this in the folder compare, but not in the file compare (i.e. I can ignore files on the left that aren't on the right, but not lines in a file compare).  Is there a way to do this?</p>
  
  <p>Example:
  left file:
  1,2,3
  4,5,6</p>
  
  <p>right file:
  4,5,7</p>
  
  <p>I want to see only the mismatch of "4,5,6" with "4,5,7" and for "1,2,3" to be ignored as it doesn't exist in the right.  This sort of assumes the file data is sorted in both files to some degree.</p>