These additional attributes are specific to the polyCreateFace node and can be edited from within the Attribute Editor.
Changes the number of subdivisions that are distributed along the edges of the polygon being appended. The default is 1.
These values represent the position of the vertices you placed when appending to the polygon. For example, if you placed three vertices (as in the example of the Attribute Editor), only three sets of values display. Change these values if you want to move the vertices and change the shape of the appended polygon.