Pull cards back before points are met

When laying down cards and you want to change your melds how do you pull back the cards?

I'm still trying to find that out also.

no one will tell you.

the rudest people I have ever played with.

Agreed, the rudest people are on this website playing.  They call you names, track you down on other games you play online, and harass you, if you win they call you a cheater.  Integrity and Good Sportsmanship are lost here.