ASTS(Autocad Superposition Text Search) can find out text/mtext or dimension text or attribute (also in block nested or xref) which superpose each other affect to identify, and point it out with rays in different angle. Also offer a tool to quick view it. Superposition Text Search is a necessary step of a clearly drawing work! It usually can find some fighting texts even some mistakes in a big DWG file especially made by professional software. For example :There are 19 found in "Acadr2000\sample\1st floor architectural.dwg", And found 6 in "Acadr14\sample\wilhome.dwg".