You can even purchase dual HDMI adapters that allow you to connect two monitors to a single USB port.
Most computer have their HDMI ports located on the back of the computer tower. If you are using a Laptop, the HDMI can usually be found on the left or right side of the keyboard. If your laptop does not have a USB port, you will need to use a USB-to-HDMI adapter. If you are using a USB-to-HDMI adapter, plug the adapter into a USB 3. 0 port on your computer. Then connect the HDMI cable to the other end of the adapter. Connect the other end of the HDMI cable into one of the monitors. If your computer has a dedicated graphics card, connect your monitors to the dedicated graphics card rather than the PC’s integrated HDMI port. [1] X Research source
If you are not sure which monitor is which, click Identity below the display. This displays the corresponding number for each monitor on the monitor itself. Pay careful attention to any offsets in your monitor arrangement. For example, if one monitor is slightly lower than the other, make sure it is reflected in the way you arrange the monitors in the display. If you don’t see an image on both displays, click Detect to automatically detect the displays.
Use the drop-down menu below “Change the size of text, apps, and other items” to change the scale of objects in your display. “100%” is normal size. Select “125%,” “150%’, or “175%” to make objects and text appear larger on your screen. Use the drop-down menu below “Display resolution” to change your monitor’s screen resolution. Normally, Windows will detect what resolution your monitor supports and automatically set the resolution to the recommended resolution. The higher the resolution, the more detailed the monitor’s image will be. Use the drop-down menu below “Display orientation” to select the monitor’s orientation. “Landscape” is the standard lengthwise display. “Portrait” rotates the image 90 degrees and displays a “tall” image on your computer monitor. You can also select Landscape (flipped) or Portrait (flipped) to display an upside-down image.
If your Mac doesn’t automatically detect both displays, hold the Option key and click Detect in the lower-right corner of the Display menu.
If you are not sure which monitor is which, click and hold the monitor on your display. This will display a red outline on the corresponding monitor. Pay careful attention to any offsets in your monitor arrangement. If one monitor is slightly lower than the other, make sure it is reflected in the way you arrange the monitors in the display.
