Harry-
Start by selecting your Master Track in the Mixer Tool. Unless you are interested in just the phase of a single stereo pair. In that case, pick the channel that you wish to monitor.
Now in the effects tab on the left you will find the MultiMeter in the Metering Category. Click on it and hit the + button. It should add the name of the effect in the list. If the window does not open immediately, hit the advanced button.
In the lower right of the new window hit "show presets" Untwirl the disclosure triangle next to user presets and click on the only option that appears, goniometer. Then hit "apply preset."
My favorite tool for this is a program called Spectre. I run this in my laptop next to my system when I am mixing. It is MUCH better than the metering in FCS.
[
www.audiofile-engineering.com]