OVERVIEW
This is a guideline for project teams who are creating alpha icon for PWA on XTOPIA.
Step by step
1. Open photoshop and create new document in 128px x128px with 72 resolution.
2. Place your logo inside, and use selection tool to select the object.
3. Press "CTRL+L" to change the output level to 255
4. Switch to channel tab and click on "Save selection as channel" at bottom.
5. Turn off all the channels except "Alpha".
6. Press "Alt + Ctrl + Shirt + S" to save the icon in alpha channel.
