How to Edit .9.png using Photoshop (Video Added)

Introduction:
This tutorial will explain how to edit .9.png images in an easiest way. To know more about .9.pngs please visit this thread and more on this thread. You can also see users are getting lots of error in editing .9.png images. There's a little trick involved in editing them.
Challenge:
The beginners in MIUI theme designing cannot able to understand how to draw .9.png on their own and how this works. So it is a challenging task for them. I will show here how to edit those .9.png images without understanding about it at all.

What to Do?Best way of theme designing is to take a standard theme .mtz file and extract it by dragging the mtz file on to theme editor.
Then replace the .png and .9.png files of your own designed.
You have to just watch the video below slowly, everything is explained in a simple manner. You just need 2 min. of your time to kick start your .9.png editing.

In this video you can see i have taken a sample theme designed by me "Are You OK". I will create a new theme by editing the .9.png file of existing theme.