Add your own complex modifications
Step 1
Open Complex Modifications tab and press Add your own rule button.
Step 2
An editor will open with sample rules. Change the content and press the Save button to register.
Tip
You can save by using the command + s shortcut as well.When making changes, Karabiner-EventViewer and Karabiner Configuration Reference Manual can be used to confirm the key names and how to write rules.