Settings
How the site looks on this device. All of it stays on this device.
Appearance
Dark is the default. The button in the top bar switches it at any time.
Language
Japanese and English. Each language has its own URLs, so a link you share opens in the same language.
日本語で見るWhat stays on this device
Recently used tools, the appearance setting, and anything left on the bench stay on this device. None of it is sent to a server. Clearing site data in your browser removes all of it.