Fonts used by roff are handled by WoMan as faces, the details of
which are customizable. See Faces. WoMan supports both the
italic and bold fonts normally used in man pages, together with a single
face to represent all unknown fonts (which are occasionally used in
“non-standard” man pages, usually to represent a “typewriter” font)
and a face to indicate additional symbols introduced by WoMan. This
currently means the characters ^ and _ used to indicate super- and
sub-scripts, which are not displayed well by WoMan.