TTF_SetFontSize - Set a font's size dynamically.

       This function is available since SDL_ttf 3.0.0.

       This updates any TTF_Text
        objects using this font, and clears already-generated glyphs, if any, from the cache.

font   the font to resize.

       ptsize the new point size.

       Defined in SDL3_ttf/SDL_ttf.h

       TTF_SetFontSize - Set a font's size dynamically.

       Returns true on success or false on failure; call SDL_GetError() for more information.

•(3), TTF_GetFontSize(3)

SDL_ttf                                           SDL_ttf 3.2.2                               TTF_SetFontSize(3)

#include"SDL3_ttf/SDL_ttf.h"boolTTF_SetFontSize(TTF_Font*font,floatptsize);

       This function should be called on the thread that created the font.