Ofset or Offset: How To spell?
The word Ofset is misspelled against Offset, a noun meaning "A horizontal ledge on the face of a wall, formed by a diminution of its thickness, or by the weathering or upper surface of a part built out from it; -- called also set-off."
Offset has double "ff" is mispronounced as "f"Remember double 'FF' in between the strings O & set which should not be misspelled with single 'F'
Wrong Spelling:  O-f-set  Correct Spelling:  O-ff-set 
Explore spell check of Offset to spell without errors.