Thanks a lot for explaining some thing to all other users. It's very good. Actually this is total a practical work. And there is need of more pictures instead Of.our common post. Because I have to show all working with proof. And I tried to you every thing with own practical examples . That,s why there are lot of pictures. So don't need to be confused and started to get knowledge one by one. If we will.think.that there there is too much then we will confuses. But it's really very easy