ClearType Registry Settings Location in Windows

This article explains the exact Windows Registry locations where system-wide and user-specific ClearType text tuning parameters are stored. Modifying these registry keys allows administrators and advanced users to configure font smoothing, contrast levels, gamma correction, and subpixel rendering across displays without using the graphical ClearType Text Tuner wizard.

Registry Paths for ClearType Settings

Windows divides ClearType text rendering configurations into modern Avalon graphics parameters (used by WPF and modern Windows UI) and legacy GDI desktop settings.

1. System-Wide ClearType Tuner Parameters

System-wide ClearType configurations—which apply to all users and the Windows sign-in screen—are stored in the following registry key:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Avalon.Graphics

Under this key, Windows creates subkeys for each connected display adapter and monitor (for example, DISPLAY1, DISPLAY2).

2. User-Specific ClearType Tuner Parameters

When a specific user tunes ClearType using the built-in wizard, the customized parameters are stored under:

HKEY_CURRENT_USER\SOFTWARE\Microsoft\Avalon.Graphics

Just like the local machine path, this key contains subkeys corresponding to each active monitor.

3. Standard GDI Font Smoothing Settings

General font smoothing flags and base ClearType controls are located in the user’s desktop control panel registry key:

HKEY_CURRENT_USER\Control Panel\Desktop

Key Registry Values Explained

Inside the Avalon.Graphics\<DISPLAY_NAME> subkeys, the following DWORD values dictate how text is rendered:

• ClearTypeLevel: Determines the degree of ClearType subpixel rendering. Valid values range from 0 (off) to 100 (full ClearType).
• GammaLevel: Defines the display gamma used for text rendering. Values typically range between 1000 and 2200 (representing gamma values between 1.0 and 2.2).
• PixelStructure: Specifies the subpixel layout of the monitor:
  • 0: Flat / grayscale rendering (no subpixel optimization)
  • 1: RGB (standard stripe layout)
  • 2: BGR (reversed stripe layout)
• TextContrastLevel: Adjusts font weight and contrast, typically configured on a scale from 0 (lightest) to 6 (darkest).

Inside HKEY_CURRENT_USER\Control Panel\Desktop, the following values manage legacy font smoothing:

• FontSmoothing: Set to 2 to enable font smoothing, or 0 to disable it.
• FontSmoothingType: Set to 2 for ClearType smoothing, or 1 for standard antialiasing.
• FontSmoothingGamma: Standard desktop font smoothing gamma (typically 1000 to 2200).
• FontSmoothingOrientation: Set to 1 for RGB or 2 for BGR.

How to Access and Modify the Keys

1. Press Win + R, type regedit, and press Enter to open the Registry Editor.
2. Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Avalon.Graphics to adjust system-wide defaults, or HKEY_CURRENT_USER\SOFTWARE\Microsoft\Avalon.Graphics for the current user profile.
3. Select the target display subkey to view or modify the text tuning values.
4. Restart the system or sign out and sign back in for the changes to take effect across all applications.