You can select the defaut video stream (see The Video Camera Object) for all video cameras on the layout on the top panel:

• Auto—use GreenStream technology. A low-quality video stream is used by default. When you select a surveillance window, the video stream is switched to a high-quality video stream. When you select another camera, the video stream is switched back to a low-quality.
• High—use a high-quality video stream.
• Low—use a low-quality video stream.
• Other—use a specific video stream of a video camera.