At the shell, ^V^_ produces US, and ^V^^ produces RS. Each control character has an associated character for this reason. Most programs will display them in r

At the shell, ^V^_ produces US, and ^V^^ produces RS. Each control character has an associated character for this reason. Most programs will display them in reverse text or with the leading caret. Anyone who got used to using ^[ for escape in vi would already be familiar with this approach.