Auto Arrange & Nested Map

1. I would like to know that how do I get the option " Auto Arrange" which I saw in the below video, there is is connect now option is there but i dont have the Auto arrange option

In the top ribbon bar in Network Atlas select the tab called "Edit" and almost all the way over on the right hand side of the ribbon are the auto-arrange options.

2. How do i create a nested map for Ex : we have Offices in North America, SA , EU, FE, MEA and inside the country we have 25 branches in each country so i would like to create a nested map,

Create new instance for each map.  Once you have done that.  Open whatever map will be the parent map and in the next hand group by, expand Maps, select the Child map and drag it onto the parent map.