OnScreen Control (OSC) is a dedicated app that lets you easily manage [Screen Split], monitor settings, and [Picture Mode] on your LG monitor using a mouse.
If the app does not launch properly or the menu does not appear, make sure that your LG monitor is connected correctly using a genuine cable and that your PC’s display setting is set to [Extend] mode.
Why Is the OnScreen Control (OSC) Menu Disabled or the Monitor Not Detected?
- If the LG monitor is not properly connected to your PC or laptop, or if you are using a third-party monitor, some OSC features may be limited.
- Communication between the monitor and PC via DDC/CI may fail if a non-genuine cable or adapter is used.
- If the PC’s graphics driver is not up to date, the OSC menu may not appear or may be disabled.
How to Download OnScreen Control (OSC) and Use Its Main Features
Download and Install OnScreen Control (OSC)
To install the latest version, download the appropriate file for your operating system from the LG website.
- 1.Go to the LG website and select [Support] from the top menu.
- 2.Under [Support] or [Service], select [Manuals & Software] or [Drivers for Downloading].
- 3.Enter the exact model name of your monitor (e.g., 27GN950) and select the model from the search results.
- 4.Download the installer that matches your operating system (Windows or macOS).
- 5.Open the downloaded file, extract it if needed, and run the installer to complete the installation.
Main Features of OnScreen Control (OSC)
- Screen Split: Lets you divide the monitor screen into multiple regions to match your work environment.
- Monitor Settings: Lets you adjust brightness, contrast, and other monitor settings, and perform firmware updates.
* Note: A USB connection between the PC and monitor is required (USB-C to USB-A, USB-A to USB-B, USB-C to USB-C, or Thunderbolt cable). - My application Preset: Automatically switches the picture mode to your preset choice when you click a specific application window.
- Game mode settings: Lets you adjust game-related monitor settings.
- 5:9 Preview: Lets you preview applications in the 5:9 area and easily move them to your desired position.
* Note: Click the [Preview] button in the top right corner of the OSC window - For more details, select [View User Tips Again].
How to Update the Monitor Software
- Automatically updates to the latest firmware version. (Internet connection required)
- To use this feature, make sure the monitor and PC are connected using a USB-C to USB-A or USB-C to USB-C cable.
Frequently Asked Questions (FAQ)
- Q. When I launch OnScreen Control (OSC), I see the message [There is no monitor to display.].
-
A. This message appears when the PC display setting is set to [Duplicate] mode, which is not supported.
It may also appear if a non‑standard cable or adapter is used, preventing proper DDC/CI communication.
Use the cable provided with the monitor, such as a DisplayPort cable, to connect the monitor directly.
- Q. The firmware update does not start.
- A. Your PC must be connected to the internet, and the monitor must be connected to the PC using a USB-C to USB-A or USB-C to USB-C cable for the firmware update to work properly.
- Q. I experience input lag when running OnScreen Control (OSC).
- A. Uninstall OnScreen Control and install the latest version from the LG website.
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This guide was created for all models, so the images or content may be different from your product.
