How do you do YTB

How-to Questions
1

I have a pattern and there is a YTB after a row of purling. The pattern is:

YTB, p2tog across

and it says that it makes a new stitch.

So…what is YTB and how do you do it?

2

YTB or Yarn To the Back
It will be same as a Yarn Over, wrap the Yarn around the Needle once.
see YO video, in Glossary page above. second half of video shows yo with purl sts.