The external preview is a Studio utility that allows you to use one or more additional displays for Studio's preview based editing. When working with CoreMedia Studio, the external preview can be started by clicking on the 'open external preview' button that is located on the toolbar of the preview and following the instruction steps which are:
Insert the following URL in the address bar of the browser on your desktop computer or on your mobile device.
Enter the 4-digit number to open the external preview. The code is mandatory to identify the corresponding user session and to prohibit monitoring the work of other users.
The dialog shows the URL of the external preview. It can be invoked on any browser and device, including tablets to see how the document would look like on this device.