Final answer:
To minimize the roundness of a client's face in corrective makeup, contouring and highlighting techniques can be used strategically.
Step-by-step explanation:
For a client with a round face, corrective makeup techniques can help create the illusion of more balanced facial proportions. To minimize the roundness, you can contour the face by applying a darker shade of foundation or bronzer to the temples, below the cheekbones, and along the jawline. This creates shadows and gives the face definition. Additionally, highlighting the center of the forehead, bridge of the nose, and the high points of the cheeks can help create the appearance of a more elongated face.