GIMP is my main image editing tools，After a recent convert to the use of Manjaro，GIMP version rose to 2.10，Many good-looking interface，But just to be ready when the image background transparent，But how could not find the kind of options，Had to search the Internet，Fortunately, Japanese users to share description。
GIMP 2.10 color transfer function is located transparency "color" - "the color into Alpha."。
【參考連結】
- GIMP 2.10.4 Japanese localization and use of the color of the latest version menu| How to use the use-Gupe of free WordPress Using · GIMP
