Having trouble using auto pencil setting. Am I correct in assuming that with setting on "fill" each cell will automatically display possible numbers? If not, then what does auto pencil: fill mean?
Auto pencil setting applies to what happens to pencil marks as digits are entered into or erased from the cells. The "fill" setting means that if you were to delete a value from a cell, then all the "related" cells would get that number for a pencil mark. That is unless they couldn't have that number because of other conflicts. By "related" I mean cells that belong to the same row, column or 3x3 square.