I am quite new to knitting and working on a sweater for my dog. The pattern says to knit using a circular needle and follow a pattern. I am stuck when it comes to this part:
On the last round, 12 stitches before round marker start knitting with a new needle. Continue with new needle until you have 12 stitches after marker. (total of 24 stitches on new needle)
With original needle, cast off 4 stitches, work to last 4 stitches on original needle, cast off last 4 stitches
Work back and forth flat for 1 inch, remember to continue pattern with cables. Cut yarn.
I have put 24 stitches on a double pointed needle and now the thread is on the new needle. How do I go back to working on the original needle and what does it mean to go back and forth flat?