On Windows, use Alt codes with the numeric keypad
On Windows, use the US International keyboard layout
On Windows, use the Character Map app
On Mac, press and hold a letter to see accent options
On Mac, use Option plus a key, then type the letter
On Mac, use the Keyboard Viewer
On iPhone or iPad, press and hold a letter to choose an accent
On Android, press and hold a letter to choose an accent
In Microsoft Word, use Insert then Symbol
In Google Docs, use Insert then Special characters
Copy and paste accented characters from a character map or website