Total war series with a dual monitor setup

In the total war series, specifically Rome and Shogun Total war 2, you can scroll/rotate the map by moving the mouse cursor to the edge of the screen.

This works fine on a single monitor, but I have two monitors setup. When I move the mouse to the edge of the screen the game does not seem to detect this and as a consequence the map does not scroll/rotate.

Is there a way to remedy this, short of unplugging the second monitor?

You can try either of the following methods:

1. Use Cursor Lock to confine the mouse cursor to a selected area on the screen.
2. Press Win + P and choose Projector/Computer only, depending on whether your're playing on your secondary or main screen respectively. This will allow you to quickly switch between single or multiple monitors without unplugging the second monitor.