How to Type Symbols Using the ALT Key. In Windows, the key combined with numeric codes can access characters that aren't readily available on a normal keyboard. While Alt codes don't exist on Mac computers, there are a variety of Option.
The ALT key can help you access alt codes, or characters that aren't readily available on a normal keyboard. These codes can be used to write in foreign languages, mathematical equations, or to add fun symbols to your messages.
Instead of having your phone vibrate or ring when you get a call or text, you can have it emit an LED flash. Go to Settings > General > Accessibility, then scroll down and turn on “LED Flash for Alerts.
Hold 0 to Get Degree Icon If your topic is related to weather or chemistry, you may need this function to present “degree”. Hold the number zero for several seconds, and the degree icon will show above.