I can't remember the names but 1st press and 2nd press. I used to first press soon as I started up the truck. Then I realized that on the highway when I would let off the accelerator, for timing of other vehicles, I would be having to accelerate to get back to speed more than just letting it "idle" down. The one thing that might be a side effect of using it all the time is that my brakes lasted to just below 90k miles.
Now, if I am on the highway, I use the 2nd press for only when I hit the brake pedal. In town I put it on the 1st press. I did an experiment with the 30 mile trip going to work. 1 Day did 1 press and then the next day 2nd press, same direction/same speed/same weather conditions and seen barely 2 mpg difference. If it was an actual 2-300 mile trip I would think that I would get better results.
In either mode, sometimes the trans hits hard when decelerating and hits 30mph. I used alphaolb to show what was going on and either 3rd or 4th is skipped. IIRC 6-5-3-2-1. (tow mode or not) . On icy and even just a dirt road, the 30mph hit will actually lock up the wheels fir a split second.