I typically purchase lumber already straight lined on one edge. My latest project involves rough 5/4 and most of the 10' boards have a slight bow on both edges. In the past when I've done this I've used a narrow strip of 8' x 3/4" plywood as a sled with hold downs to hold the bowed stock then straighten one edge by sliding the plywood jig against the fence...rudimentary but worked OK. I no longer have that jig am am wondering, before I make up a new one, whether I might get some better ideas on how to do this with a cabinet saw (I don't have a track saw and have no interest in purchasing one).