How do multiple page (unicode?) font actually work

[mrclnz]

I know that from a display list perspective a font is a cell from a bitmap (i.e. an handle). How does the coprocessor handle
fonts with more characters (i.e. with extended metrics)? Does it use multiple handles or reconfigures on the fly the handle to another address?
I also suppose that the ASTC font cache works copying from flash to ram and configuring the handle to work from ram, am I wrong?

Thanks in advance