You have the ability to split elements using this feature. You must first select a point in your element where you would like the split to occur. Then click on the "Split Element" button or click on the "Edit Menu", "Split Element". The point that you had selected will exist in both of the new elements. You can split all types of columns and walk stitches. The following rules do apply:
You can only split on a straight point, not on a curved point, because splitting on a curved point would change the shape of the element.
You cannot split at the ends of an element.
For Column 2, you must select two points to split, one on each side. Hold down the "Ctrl" key to select multiple points.
For Column 1, you can select just 1 point because column 1s have matching pairs.