Grafting

Invisible stitching allows you to join two knitted items together by creating an additional row.

To make it, once the piece is knitted, leave the stitches on hold without casting them off.
Thread a yarn the same color as the knitting onto a canvas needle.
Work on the spot:insert the needle into the center of the 1st stitch and out into the center of the 2nd stitch, repeat this operation in the other part of the knitting.
In this way, pick up all the released stitches one by one, dropping the stitches from the knitting needle as they are sewn.

This forms a row of stitches that imitates a knitted row and unites the two parts of the knitting.