To change the resolution from 3440×1440 in Windows 10, you can follow these steps:
1. Press the Windows key + R on your keyboard to open the Run dialog box.
2. Type “regedit” (without the quotes) and hit Enter. This will open the Registry Editor.
3. In the Registry Editor, navigate to the following path: HKEY_CURRENT_CONFIG\System\CurrentControlSet\Control\VIDEO\
4. Under the VIDEO key, you will find several subkeys with long names consisting of numbers and letters. Each subkey represents a different display adapter installed on your system.
5. To determine which subkey corresponds to your display adapter, you can expand each subkey and look for entries named “AdapterDesc” or “Device Description” that match your display adapter.
6. Once you have identified the correct subkey, expand it further until you see a subkey named “DefaultSettings.XResolution” and “DefaultSettings.YResolution”.
7. Double-click on “DefaultSettings.XResolution” and “DefaultSettings.YResolution” to modify their values.
8. In the “Value data” field, enter your desired resolution width for “DefaultSettings.XResolution” and your desired resolution height for “DefaultSettings.YResolution”. For example, if you want to change the resolution to 1920×1080, you would enter 1920 for XResolution and 1080 for YResolution.
9. Click OK to save the changes.
10. Close the Registry Editor.
11. Restart your computer for the changes to take effect.
After restarting, your display resolution should be changed to your desired resolution. Keep in mind that not all display adapters or monitors may support every resolution, so make sure to choose a resolution that is compatible with your hardware.
If you encounter any issues or the desired resolution is not available, you can try updating your display adapter drivers or checking the manufacturer’s website for any available driver updates.