Add it to the Press & Hold character picker
You can add it to a letter's Press & Hold character picker.
Append the following to the
Keyboard-en.plist file (before the closing
Feel free to change the
Roman-Accent-w to any character you wish, providing it does not already have Press & Hold keys assigned.
If you wish to use a character with an existing Press & Hold set, you can append the
₡ to the relevant
<string> lines for that character.