[Need Help] ATtiny13 with 128x64 OLED

[Jimmy-arduino]

I am testing with the code for ATtiny13 version. Does anyone know how to modify the code to apply it to 128x64 OLED? I have read about using OLED, but it is too difficult for me to understand, so I cannot solve it by myself. I need to use 128x64 instead of 128x32, so please help me. For reference, I changed the set multiplex related value in the code from 0x1F to 0x3F, but it did not work.

===================== // OLED init settings const uint8_t OLED_INIT_CMD[] PROGMEM = { 0xA8, 0x3F, // set multiplex (HEIGHT-1): 0x1F for 128x32, 0x3F for 128x64