1. Open Settings, and click/tap on the System icon.
2. Click/tap on Display on the left side, and click/tap on the Advanced display settings link at the bottom of the right side.
3. Select the display that you want to change the screen resolution of. If you are not sure which display belongs to what number, then you can click/tap on the Identify link to have each display’s number appear briefly to see.
4. Under Resolution, move the slider left or right to select a screen resolution (ex: 1920 x 1080) that you want for the selected display, and click/tap on Apply.