That's "custom character support", or properly DRCS - Dynamically Redefinable Character Sets, not full SIXEL graphics. It's essentially a way to send custom "f

That's "custom character support", or properly DRCS - Dynamically Redefinable Character Sets, not full SIXEL graphics. It's essentially a way to send custom "font" to terminal. You could push it to get certain level of graphics, but it's not the same as capability of sixel bitmap.