The first part of my pattern I'm working on says "CO 60sts onto one size 7 circular needle". I did that....now it says "Slip 30sts onto the other size 7 circular needle. Join to knit in the round". Now how do I do that...do I make slip knots onto the other needle because I'm not sure what a regular slip stitch is by itself in knitting...I'm new to it. Thanks....