[Greensock tweenlite.to .add()]

wow thanks rhernando for you very detailed reply. 1+

[Greensock tweenlite.to .add()]

Hi,

 

I found difficult to under the following code example, what's the .add() doing there

 

http://api.greensock.com/js/com/greensock/TimelineLite.html#add()

 

from reading the api i understand it's adding a label, but still find its confuse, can someone explain? 

 

Thanks

 

tl.to(car, 1, {left:177, ease:Back.easeOut})

  .add("up", "+=1")

  .to(car, 1, {top:70}, "up")

  .to(lift, 1, {top:167}, "up")

  .from([man1, man2], 1, {left:-100}, "up+=0.8")

  .from(man3, 1, {left:600}, "up")

  .to(man3, 0.2, {scaleX:-1}, "+=1")

  .staggerTo([man3, man2, man1], 1, {left:600, ease:Power2.easeIn}, 0.5, "menOut")

  .to(lift, 1, {top:297}, "down")

  .to(car, 1, {top:200}, "down")

  .to(car, 1, {left:600, ease:Power1.easeIn}, "out")