A great video from what looks like an old 'Shell's Wonderful World of Golf' special between Gay Brewer and Billy Casper.
Here's the pic to freeze:
They both used what I like to call 'old school footwork' where they pulled the left heel up off the ground in the backswing and then planted it on the downswing. Something that great instructors like Kelvin Miyahara or Shawn Clement would recommend. But the big thing for me is the right foot. Casper is on the left and he's got it down perfect. Brewer's heel is up off the ground and sliding towards his left leg. I'm not so sure I would say he's 'pulled' the heel off the ground like I would like to see it done...but notice that the weight really isn't on the toes either and more or the side of the ball of the foot. So the heel is not being 'lifted' off the ground by Brewer either. In my most recent post I noted that I was getting 'antsy' with my footwork again. Meaning, getting up on the toes slightly with the right foot and lifting the heel up off the ground instead of having the heel pulled off the ground. It's almost astonishing of the ratio of Tour pros, current and in the past, who understand this simple, but powerful concept.