To type an upside-down exclamation mark (¡) on a Mac, press the Option + 1 keys simultaneously.
On Windows, you can use the Alt code method by turning on the Num Lock, holding down the Alt key, and typing 0161, then releasing the Alt key.
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡...................
Thanks. No way I’ll ever remember that, so I guess I’ll keep typing in English.