QuickCompare drawing comparison software for pipe, duct, electrical, underground engineering and construction gives the engineer a tool that takes two electronic PDF drawings, compares them and produces a third showing differences. The new PDF drawing shows all of the differences highlighted as Added (Green), Removed (Red) or Unchanged items (Black). Using QuickCompare the need to print PDF drawings to compare them, incurring cost and time taken is saved. The on screen feature offered by QuickCompare will automatically compare two PDF drawings removing the need for drawing board sized desks and huge storage areas for current job drawings.