The document discusses the 7 principles of interior design: scale & proportion, unity & harmony, rhythm, balance, emphasis (focal point), colour, and detail. It provides descriptions and examples for each principle. Scale & proportion relate to the size of design elements relative to one another or the whole. Unity & harmony involve using common themes or styles to link different interior spaces. Rhythm incorporates repetition, progression, transition, and contrast of design elements to create visual movement. Balance can be symmetrical, asymmetrical, or radial based on the distribution of visual weight. The emphasis or focal point should draw attention. Color influences mood and atmosphere. Details are an important but often overlooked part of interior design.