Knitted fabric can be given any shape: rectangle, square, triangle, circle. Use addition and subtraction loops. Perform them at the edges of the canvas, and inside, trying to do almost imperceptible.
To increase the number of columns in the row you need in a certain place, made from one loop of the previous row knit into two or more columns (figure 15). To reduce the number of columns in a row, miss, not promazyvaya, some loops in the middle or at the end of the canvas.
Another, less noticeable, way to purl two columns — the set (figure 16). To do this, the knit columns without nakida pull loop at first from one, then from the next loop of the previous row, grab the thread and pull it through all 3 loops. The hook will be one column without nakida, the bound of the two loops. When knitting columns with nakida not dokazyvaya them to the end, that is, stretch the thread only once (through the loop and yo) in one other column. On the hook are formed of 3 loops. Provarite them together.