Multiscale training enhances model performance by training on images of varying sizes, allowing the model to better generalize across different scales and distances. In YOLO11, you can enable multiscale training by setting the scale parameter in the training configuration. For example, scale=0.5 reduces the image size by half, while scale=2.0 doubles it. This technique simulates objects at different distances, making the model more robust across various scenarios. For settings and more details, check out the training configuration.