pivot, lathe and snap

first say im sorry if im always compare with maya because i came from maya.

1. can someone tell me what the pivot is in nvil?

heres the case.
the goal is i want make my pivot different with another object.
heres what i do in maya its pretty easy.
http://sendvid.com/pj2bfnm8

but in nvil i use object/mesh pivot streamline i got the problem like this.
http://sendvid.com/0qgx5sro
always back to previous position. sometimes i use the second method is use "set manual" but all object have the same pivot.

2. the lathe(revolve).
http://sendvid.com/men3eub7
"By default, world space is used. If saved transfrom is presented, it will be used". what the saved transform mean? because it always using world space how. do i change that?
because as i know in maya it can easily manipulate with pivot.
http://sendvid.com/w4x3rk85

3. how i can snap and orient object with other object but with realtime like this? this is usefull for making floater object.
http://sendvid.com/fm2h8f37
and copy/instance the object snap the suboject.
http://sendvid.com/tn8dk384
as far as i know i can use snap to normal. but its too hard. when i have a lot of object

4. my edge display seems broken. how do i solve that. (my graphic card is nvidia GT540m)
[img=http://s3.postimg.org/fzzypskb3/edgebroken.jpg]