I've been working on a baby dress and I'm just about done...except the last directions say for the buttonhole row: Work in rib over first 3sts, bind off next 4 sts, work in rib to end. I know how to bind the sts, but what does it mean to work in the rib? The past 8.5in before that it was k2, p2 so there is a rib pattern going on but I don't know what it means to work in the rib. Also for the next row it says: work in rib, casting on 4 sts over bound off sts. continue to work even for 4 rows. Again, I don't know what working in rib means, and I imagine I cold figure out how to cast on 4 sts over the bound off ones...that sounds pretty straightforward, and then do the same thing for the next 4 rows.
Work in rib just means to work the same rib pattern you've been working, knit the knits and purl the purls. You'll work 3 sts keeping in pattern then bind off 4 sts and then pick up the rib pattern again. When you do the next row and come to the bound off stitches you can use a knitted cast on to add the 4 sts back. Just move the right needle to your left hand, cast on 4 sts, move it back to your right hand and pick up the rib pattern where you left off. HTH
This is the last time I'm frogging this project for the last time.