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

NAME
SDL_HINT_VIDEO_X11_SCALING_FACTOR - A variable forcing the content scaling factor for X11 displays.
SYNOPSIS
#include <SDL3/SDL_hints.h>
#define SDL_HINT_VIDEO_X11_SCALING_FACTOR "SDL_VIDEO_X11_SCALING_FACTOR"
DESCRIPTION
The variable can be set to a floating point value in the range 1.0-10.0f
This hint should be set before SDL is initialized.
AVAILABILITY
This hint is available since SDL 3.2.0.
Simple Directmedia Layer SDL 3.2.20 SDL_HINT_VIDEO_X11_SCALING_FACTOR(3)