Heel Toe shifting is double clutch shifting. Just two ways to say the same thing

You pop the clutch out and rev-match, then put the clutch back in to change gears...


Sequence.

1)depress clutch
2)move shift lever to Neutral
3)release clutch
4)rev-match to engine to speed/gear
5)depress clutch
6)select gear
7)release clutch


if done properly it is fairly quick. I can get from 5th to 2nd in a second and a half or so... maybe less... Of course you could just choose the proper gear and not work your way down all gears.