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# Better out-of-the-box display for FORM FEED
By default, FORM FEED is displayed as a dumb `^L` glyph. This is
surprising considering it shows up in so many places:
- Emacs source files (C and Elisp),
- help buffers:
- `describe-mode`,
- `describe-bindings`,
- `view-emacs-news`,
- log buffers:
- `*Compile-Log*`,
- `*Dired log*`,
- …
You can even see it in source files of other GNU projects, like GCC.
"Pages" are important enough to have their own navigation and
narrowing commands, yet their default delimiter is displayed as an
unassuming control character.
I like the way form feeds are displayed with [`page-break-lines`];
magit's `show-lines` blaming style achieves a similar look.
Having this kind of display by default would make it more obvious that
this character has actual navigation semantics; as it stands, it looks
no different from some stray CARRIAGE RETURN.
This hypothetical thin-line display could be re-used by e.g.:
- `describe-symbol`, which uses the following method to visually break
up multiple symbol definitions:
``` lisp
(insert "\n\n"
(eval-when-compile
(propertize "\n" 'face '(:height 0.1 :inverse-video t)))
"\n")
```
- Custom buffers, where sections are delimited visually with a
999-character wide underlined space.
(See [emacs-devel][emacs-devel-thin-line] for a use-case recap.)
Full disclosure
: This reflection started because moving over this underlined space
with `truncate-lines` on causes the screen to jump horizontally.
This specific problem should be fixable without dragging FORM FEED
display into the discussion, but I feel like the latter is the
more interesting issue ([who on Earth] enables `truncate-lines` by
default anyway).
[`page-break-lines`]: https://github.com/purcell/page-break-lines
[emacs-devel-thin-line]: https://lists.gnu.org/archive/html/emacs-devel/2019-05/msg00268.html
[who on Earth]: https://gitlab.com/peniblec/dotfiles/blob/master/.emacs-custom.el
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