FLIP:
Lower the suspension on the way back,(prevents hitting front of a low trailer and pushing grease off the turntable & making a mess) then as you get under raise and click,tug to make sure,check fully raised & hopefully the legs will be clear of the ground. As wheelnut says,it can all be done in one swift steady movement.
Dropping (don’t know why so many firms tell their drivers to leave the legs a few inches off the ground,mind you most places I’ve worked haven’t had silly,imho uneccesary, lead up ramps on the tractors anyway) I wind the legs down 'til they just contact the ground or plate,whichever they’re going to sit on,lines etc off & as she slips off the pin,air,down & watch the trailer settle,again it leaves the grease where it should be,no damage to trailer,legs or load from dropping to the ground & tractor air bags can’t pop off their seals due to sudden inflation caused by lack of imposed weight.
^^ just like what he said 
every so often when bulk is quiet , a couple of us are asked to pull a curtainsider , all fine but i have found one driver always leaves his suspension right up when he drops the trailer 
, trouble is i cant jack my unit up as far as his so i always end up having to wind the trailer down again 
the only reason i’v only wound legs down till 4-5 ins off the floor is on tanks, as liquid runs back & raises the front of the trailer like a seesaw , so when it’s loaded without a unit , it’s easier to re-couple 
