Sentence:  You must learn to be ingenious in arranging <WSD>groundplans</WSD>. Always avoid the dull and trite—what may be called the no-room: that bare, three-walled room without architectural jogs for relief; that room with a routine selection and placement of furniture; that room with doors placed in balanced positions in the walls. New ideas about illustrating the action will present themselves to both you and the actors if you think and feel freshly about what makes up a <WSD>groundplan</WSD>. 
Meaning of the word marked with <WSD> tags:  A diagram showing the physical layout of a set, especially the placement of structures on the stage, as opposed to items on the walls or suspended from the ceiling.