Emulator Settings

Tools → Emulator Settings configures each system's emulator without launching a game first. Every system is listed with the core it runs on (e.g. Arcade (FBNeo) (fbneo), Atari 2600 (stella2014)).

Select a system with A to edit its emulator options. These are the same options as Options in the in-game pause menu. Here you set them as the system-wide defaults.

For a single game, use Emulator Options in the game's context menu instead. Per-game options override the system-wide settings made here. See Emulator Options for how the three configuration places fit together.