Watch the video to learn how.
1/sl1 RC Insert right needle into the front of the 2nd st knitwise and k that st; then slip 1st st to right needle purlwise. Ends with 2 sts on the right needle.
sl1/1 LC Insert needle from behind 1st st into back leg of 2nd st knitwise; pull and then insert needle into 1 st and knit, slip both sts to right needle. Ends with 2 sts on right needle.
NOTE: If you’re working from the Dolly swatch guide, you’ll be working the stitches sl1/1 LC and 1/sl RC exactly as described, but the other knit and slip stitches in your cable-cross row will be worked as follows:
Row 7 With Colour B, k1, (sl1/1 LC, sl1wyib, 1/sl1 RC) to last st; k1.