Chat settings

Open Settings > Chats.

Chat appearance

Setting	What it does
Theme	Light, dark or system. See Light mode and dark mode.
Chat theme	Bubble colors and wallpaper. See Chat themes and wallpapers.
Font size	Small, Medium or Large message text, everywhere messages are shown.

Setting	What it does
Enter is send	The Enter key sends your message instead of adding a line break.
Media visibility	Show newly downloaded media in your phone's gallery. You can change this for one chat in its profile.

Reset chat settings sets font size, Enter is send and media visibility back to their defaults. Your themes and messages aren't touched.