TGMC:CSS
What is CSS?
for our purposes it's what the chat looks like.
You can change it if you would like via the Preferences Tab and using the "Update Custom CSS" verb there.
which leads us to some Custom CSS.
If you ever want to return to 'normal' or 'standard' use the following link.
If you would like a relatively standard 'dark' mode use the following link. Courtesy of Deep Space 13.