To prevent the game from resetting your custom changes after a restart, right-click the file, select Properties , and check Read-only . Managing Content in Call of Duty Games - Activision Support

Adjusting settings like RendererWorkerCount to match your CPU's core count can significantly improve frame rates.

Open the file using a text editor like Notepad or Notepad++ .

You typically do not need to download a new file from a third party; you can edit your existing one. Navigate to: Documents \ Call of Duty \ players .

This file is a that stores custom game settings. Players often "download" or share pre-modified versions of this file to:

Fine-tuning graphics settings beyond the in-game menu options.