How the "Example 7 - Scroll View (Panel)" Zoom with different resolution

[xiangsoft]

I'm a new NGUIer
Today I Study The "Example 7 - Scroll View (Panel)".
I found it can zoom with different resolution without UIStretch script.
How it made that?
Can u help me?

Sorry about my english, I'm from china.

I forget to tell my NGUI Version is 3.0.5

[ArenMook]

That example uses a fixed size UIRoot, which is I assume what you're referring to. Fixed size UIRoot ignores screen size.