LG 27UK580 Owner's Manual page 34

Settings > Picture
Game Adjust
34
Sets a response time for displayed pictures based on the speed of the screen.
For a normal environment, it is recommended that you use Fast.
For a fast-moving picture, it is recommended that you use Faster.
Setting to Faster may cause image sticking.
Response Time
Faster
Fast
Normal
Off
You can control the black contrast to have better visibility in dark scenes.
Black Stabilizer Increasing the Black Stabilizer value brightens the low gray level area on the screen. (You can easily distinguish objects on dark game screens.)
Reducing the Black Stabilizer value darkens the low gray level area and increases the dynamic contrast on the screen.
Description
Sets the response time to faster.
Sets the response time to fast.
Sets the response time to normal.
Does not use the response time improvement feature.