title: Highlight duplicate values
body: <p>In Excel, Office 2007, I have the option to highlight duplicate values on the menu. Keep simple! Select the column, select "Conditional Formatting" - "Highlight Cells Rules" - "Duplicate Values" and voilá! All values that were duplicate on this column it was paint with color red, for example.</p>
  
  <p>Actually I use the LibreOffice Calc, version 5.0.3.2, and I can't find this option on the menu!</p>
  
  <p>How can I do this job?</p>