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# Custom CSS
With custom CSS, you can adjust the software’s appearance without modifying the source code, making the interface more to your liking—for example, changing fonts, tweaking the theme color, or adjusting the chat bubble background.
### Where to set it
After enabling it **【Settings】→【Appearance】**at the bottom of the page, find **"Custom CSS"** code box, and enter your styles there to take effect in real time. If left blank, no custom styles will be loaded.
the "Custom CSS" code box at the bottom of the 【Settings】→【Appearance】 page
The CSS you enter will be injected as-is into each window's `` corresponding to a `