I have "The Ansel Adams Guide" book 1

The think is that it will be the first time toning so I am not sure if there is any difference toning the print when it is wet and after it was dried.

My question is about selenium toning and sepia toning. I know they are different chimicals.

question 1: Toning after wards or when the print is wet?

question 2: How to control the sepia tones, or it intensity (when using sepia toning of course).