StyleGAN is a neural network architecture that is able to generate photo-realistic images. The diversity of generated images are ensured by latent vectors. These latent vectors encodes important features of generated images. They provide us insight-full information about properties of image generation in StyleGAN, which may also occur similarly in other neural network architectures. Using pre-trained StyleGAN models, we have conducted several experiments to show properties on StyleGAN based on results of style modification. The experiments have shown the influence of noise and styles in StyleGAN and how latent vectors can be manipulated in generated images.