Letter Accents
Whether you’re typing in Spanish or you just want to differentiate rose from rosé, accent marks (also known as diacritical marks) can come in handy. Luckily, there’s an easy keyboard-based method to access them in macOS.
Just press and hold on a letter key on your keyboard. The letter will be typed, but you should also see a popup appear with the various accent options — just click the one you want and macOS will automatically swap the standard character for the accented one.