Provided by: libsdl3-doc_3.2.20+ds-2_all 

NAME
SDL_HINT_VULKAN_DISPLAY - A variable overriding the display index used in SDL_Vulkan_CreateSurface()
SYNOPSIS
#include <SDL3/SDL_hints.h>
#define SDL_HINT_VULKAN_DISPLAY "SDL_VULKAN_DISPLAY"
DESCRIPTION
The display index starts at 0, which is the default.
This hint should be set before calling SDL_Vulkan_CreateSurface()
AVAILABILITY
This hint is available since SDL 3.2.0.
Simple Directmedia Layer SDL 3.2.20 SDL_HINT_VULKAN_DISPLAY(3)