Editing A Brief Guide to Retroarch (section)

=== Core Overrides and Game Overrides ===

Retroarch can save additional configuration files which will override the global configuration file for particular emulation cores or games. This can be useful when some cores or games work better with different settings than you generally use.

First, make sure that you have a game loaded and running, even if you only want to save a core override. While Retroarch does allow you to load a core without loading a game, this is more of a historical leftover, as most options will not be available unless the core is actually emulating a game.

Once you have changed the settings that you want to modify, you can save an override configuration by going to "Main Menu", selecting "Quick Menu" (this is where you will usually start if you jump back into the menu from a running emulation), then selecting "Overrides". Then select "Save Core Overrides" or "Save Game Overrides" as you wish. There is also a "Save Content Directory Overrides" option, which will save a configuration file to be loaded for every game in the same directory as the currently loaded game. This may be useful if you use the same settings for a large number of games, and organize the directory structure to reflect this.