Click Apply Changes → Yes, modify system files . The tool will patch bootres.dll and update the BCD store. Reboot your PC.

It sounds like you're looking for an within GFX Boot Customizer v1.0.0.7 Mega — likely the modified/cracked version circulating online (often named "Mega" due to the file size or repack group).

: The interface is straightforward, typically featuring a side panel where you can browse and modify current settings. How to Use GFX-Boot Customizer

: Adjust the font size, style, and text colors to match your theme. Real-time Preview