You can open cameras that are represented on the Synoptic Map using icons. To do this, double-click on a camera icon and a pop-up with the camera control will appear:
By double-clicking on another camera, it will be displayed in the same window:
You can open the camera in a new window by holding down the shift key and double-clicking on the camera icon. With multiple windows open, double-clicking on another camera icon will display it in the window with the focus, unless the shift key is held down (To create a new window).
You can also drag a camera icon directly into a space on the monitoring screen, as shown in the image below:
You can also open all the cameras on the map in a popup by clicking on the 
button on the control's top toolbar.