LG 42PA4500 Owner's Manual page 175

To set PC resolution
❐
1 Right-click on the PC's desktop and select 「Properties」.
2 Click on 「Settings」 and refer to the supported format to set the resolution.
3 Select 「Advanced → Monitor → Monitor Setup」 on the setup window. Refer
to the supported formats to select the optimal vertical frequency.
✎ In PC mode, 1920 x 1080 resolution delivers the optimum picture quality.
✎ Method to set up resolution differs depending on PC type.