How to use psram in ESP32

My projects
1

how to use psram in esp32?
I want to display gif & png, but the lvgl need more ram.

I modified the code in “lv_conf.h” like this:

#define LV_USE_STDLIB_MALLOC    LV_STDLIB_CLIB
#define LV_USE_STDLIB_STRING    LV_STDLIB_CLIB
#define LV_USE_STDLIB_SPRINTF   LV_STDLIB_CLIB

but It doesn’t work.
Also display this warnning:

 [Warn]	(0.800, +150)	 read_image_data: LZW table token overflows the frame buffer gifdec.c:600