Use vertical, horizontal & diagonal lines to square up any rectangle or flying geese unit up to 4 1/2in x 8 1/2in. To fussy cut, center a design in a rectangle from 1in x 3in to 4 1/2in x 8 1/2in. The drilled holes at 1 1/2in to 7 1/2in lets you mark & add the seam allowance to fussy cut pieces.