I seldom even refer to the numbers unless I want a quick idea how long a scrap is - - I line up with a line and count over the 4, 5, or 6 inches I am looking for for a block cut. I would think you could just use a sharpie and renumber to your satisfaction. I have drawn all over mine - a 3 1/2" square, a 4 1/2" square etc. for quick reference.
Marysewfun