Why tone your Black & White images? well a slight toning to an image I believe is more inviting and pleasing to the eye. The amount of toning really depends on you, it’s a personal thing. There’s no defined rules to it, a suggestion would be to keep the same toning through a project for the state of consistency – whether that is possible. Often, some images need more or less to keep in balance with the rest of the work in the portfolio.