Here are my optimal settings for the LG UltraWide 25UM58 25-inch IPS Monitor.

This is used to adjust factory settings, we will be enabling FreeSync (on a unsupported monitor) and adjusting colour tempertures. Then we will use the normal Settings Menu to adjust user preferences.

1. Power off, then power on
2. Push left 3 times, then right 1 time, and then press the joystick button
3. Then press left and select Menu to open the service menu.

1. Enable FreeSync settings by changing the MODEL OPTION to UM58A/UM59
2. No other service menu changes are necessary so power off, then power on.
3. Push the joystick button and press left to select the Menu.
4. Under Picture > Game Adjust > FreeSync turn it On.

The aim is to run the screen at around 75Hz and with better colour accuracy.

The monitor by default on my system doesn't display at the native 2560x1080 resolution. There wasn't even an option for it so I created one.

I used NVIDIA Control Panel to create a custom resolution. Open it and by right clicking the desktop and selecting NVIDIA Control Panel then select Change Resolution > Customise > Create Custom Resolution.

You may need to tick the box Enable resolutions not exposed by the display.