Again in System Preferences, Keyboard, select the text tab. The second way is to use the Mac built-in text substitutions.Technique 1 above works EVERYWHERE, including in Word. I leave the Character box 'up and showing' so I can select symbols immediately. I put those I use a lot into my '★ Favorites'. To use, click on the icon, select 'show Emoji and Symbols'. The setup is: System Preferences, Keyboard, check the box 'Show keyboard and emoji viewers in menu bar. I use Keyboard and Emoji viewer in the Menu bar.I do a LOT of math answers online such as Yahoo!Answers where I have to enter both Greek letters like θ, but also 𝛑, √, ±, ≥, ℉, superscripts x² and subscripts H₂O, etc.
