Which Lenovo sub-brand should a customer search for to find products with four usage modes?

The correct answer is the Yoga sub-brand, which is renowned for its innovative design that allows products to adapt to four distinct usage modes: laptop, stand, tent, and tablet. This versatility is a key selling point of the Yoga series, appealing to users who seek flexibility in how they interact with their devices, whether for productivity, entertainment, or creative work.

Each of the other sub-brands has its own market focus and product characteristics. ThinkPad is primarily known for business-oriented laptops with a strong emphasis on durability and security features. Legion is targeted towards gamers, featuring high-performance components designed specifically for gaming experiences. IdeaPad offers a range of general-purpose laptops but does not emphasize the multi-mode functionality in the same way that Yoga does. Hence, when looking for devices that support multiple usage modes, the Yoga brand stands out as the appropriate choice.