You can type it in manually quote /quote surrounded by brackets.
Just THINK about what you want to quote. Keep it short.
In the old days there was a reply with quote button.
It got ugly.
People would endlessly quote and requote messages (sometimes large messages) in active threads to the point where it was very difficult to even find the response.
Despite repeated admonitions, these quotetards kept it up to the point where the quote button became a liability.