Variable: nxml-char-ref-extra-display
nxml-char-ref-extra-display is a buffer-local variable defined in
nxml-mode.el.gz.
Documentation
Non-nil means display extra information for character references.
The extra information consists of a tooltip with the character name
and, if nxml-char-ref-display-glyph-flag is non-nil, a glyph
corresponding to the referenced character following the character
reference.
Source Code
;; Defined in /usr/src/emacs/lisp/nxml/nxml-mode.el.gz
(defvar-local nxml-char-ref-extra-display t
"Non-nil means display extra information for character references.
The extra information consists of a tooltip with the character name
and, if `nxml-char-ref-display-glyph-flag' is non-nil, a glyph
corresponding to the referenced character following the character
reference.")