If you are interested in using PatSnap with multiple monitors, then unless you want to manually duplicate your browser tabs and view in other windows, you will want to use the "Multi-monitor display mode" when viewing a patent.
This can be found in the Citation, Family or Similar Patents tab.
If you click on this, it will immediately create a sub-window, where you are able to create up to 5 sub-windows. You can also choose to exit multi-monitor mode at any time.