I have several questions that i cant figure out in Maya 4.5:

1) How do i change the size of the grid?

2) how do i delete an object's history?

3) How do i link objects together?

4) how do i create an AABB?

5) how do i create a UVmap?

im sure these are basic things to be answered, but i have 0 experience in modeling, and im sure i'll be having many many more questions.