I don't either. I might if I had a Martin panel saw but meanwhile I use a steel 600mm or metre rule with a sliding stop to set the fence. I think it's better to transfer dimensions than measure them if possible.Not trusting your tablesaw ruler and having to manually measure from the blade to the fence every single time even though I knew it would be right.
Same for small stuff, I use the sliding combination square to transfer dimensions at least as often as I measure with it. You need a good hardened one for easy sliding adjustments.