The best way to set up dual monitors is by using a single desktop. The second display should be aligned with the primary monitor and about eye height. This is called the 20/20/20 rule. Most users will fall somewhere between 50/50 and 80/20. The split of the dual displays should be along an arc, and the more time you spend working on the primary show, the closer the second screen should be to the main screen. You can use a smartphone to connect to the display, but there are no settings for this device. This is especially true of Bluetooth-connected devices. Regardless of the case, you can set up dual monitors by following a few simple steps. Make sure you have the necessary cables available. If you're using a laptop, you'll need an adaptor to connect the displays. Next, you'll need to choose the input type. Most laptops have a display output for an additional display, but some recent machines are USB Type-C compatible. If you're working on an Android or iOS device, you can use a USB Type-C cable to connect the additional display. You'll probably need an adaptor to connect your device. Also, you'll want to know how to configure the monitors with keyboard shortcuts. You'll find these in your operating system's display settings.