(face-list)to a buffer?
It would be good having it in a buffer, as the output of
(face-list) is too wide to fit to a minibuffer.
Evaluate the expression in the ‘*scratch*’ buffer with point after the rightmost paren and typing C-j.
If the minibuffer smallness is the only problem you encounter, you can simply press C-h l to get the former minibuffer contents in a buffer.