qmk_firmware_custom/keyboards/atreus/keymaps/yttyx/config.h

#ifndef CONFIG_H
#define CONFIG_H

#define ONESHOT_TIMEOUT       500   // Time (in ms) before the one shot key is released

// Disable some options to reduce firmware size
#define NO_PRINT
#define NO_ACTION_TAPPING
#define NO_ACTION_MACRO
#define NO_ACTION_FUNCTION

#endif