Associating text editors with git
Using Notepad++ as your editors
you can set your default editor in Git to use Notepad++ if you have installed the editor.
1、install notepad++
2、open git bash
3、Type this command:
git config --global core.editor "'C:/Program Files (x86)/Notepad++/notepad++.exe' -multiInst -notabbar -nosession -noPlugin"when you commit, type "git commit",then you can edit your message by notepad++
reference : https://help.github.com/en/articles/associating-text-editors-with-git