I'm making mittens for the first time. And I've been following this pattern:
So I've followed all the instructions, and I'm now about to start the thumb. The problem is I don't know how!! It says, to join the 3 stitches to the 13, and you've got 16 stitches... ok... so I guess you pickup those 3 stitches, and 3 + 13 is 16. But what does that "join" mean... and how do I knit if I don't any trailing yarn?