When the capture window is detached from the main window, and is showing the Desktop screen as the video source, when you double-click the mouse left button inside the capture window, 1AVCenter will open the 'Window/Region/Frame-Rate' dialog for you to quickly select a window or region to capture from, or change the frame-rate in which to capture video from the screen. Learn more about capturing video directly from the screen.

When the capture window is detached from the main window, and is showing the web cam or other video source that is not the Desktop screen, when you double-click the mouse left button inside the capture window, 1AVCenter will show the video source in Full-Screen. Learn more about the modes in which you can use the capture window.