Notebook exercise - figure/ground
"vignette"- in which the object "floats" away from the edges of the sheet or ground;
"interacting" or "integrated -F/G relationship in which both the figure and the ground have equal importance;
"ambiguous" or "alternating"- F/G relationships in which it is unclear just what is the "figure" and what is the "ground"
"Interpenetration"- involves a reversal of the F/G relationship at selected points where contour lines would otherwise be lost against a predominately dark or light background.