A method for quickly invoking a small window while a video is being displayed in full screen, a graphic user interface, and a terminal are provided. The method may include: When a terminal displays a video playing interface in full screen, the terminal may display a small window in a hover box based on a user operation. A display interface of the small window may be switched. The terminal may further quickly switch between multi-window display and full-screen display based on a user operation. In this process, the terminal continuously plays the video. According to this method, the terminal can quickly switch between multi-window display and full-screen display while continuously playing a video.