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| author | Eli Zaretskii <eliz@gnu.org> | 2023-02-22 15:16:25 +0200 |
|---|---|---|
| committer | Eli Zaretskii <eliz@gnu.org> | 2023-02-22 15:16:25 +0200 |
| commit | 003759a6dca730df6fae6c9bc8d4a47761b10014 (patch) | |
| tree | 2099b07f2c22f9f1a4261a828d2877c3c6f34893 /doc/emacs | |
| parent | ba91a76659b911f90914a61a2f2d5c0073a8890a (diff) | |
| download | emacs-003759a6dca730df6fae6c9bc8d4a47761b10014.tar.gz | |
Explain effect of variable-pitch fonts on fill-column
* doc/emacs/text.texi (Fill Commands):
* doc/emacs/display.texi (Displaying Boundaries):
* lisp/display-fill-column-indicator.el
(display-fill-column-indicator-mode): Document caveats of using
variable-pitch fonts with 'fill-column' and its indicator.
(Bug#61677)
Diffstat (limited to 'doc/emacs')
| -rw-r--r-- | doc/emacs/display.texi | 6 | ||||
| -rw-r--r-- | doc/emacs/text.texi | 7 |
2 files changed, 11 insertions, 2 deletions
diff --git a/doc/emacs/display.texi b/doc/emacs/display.texi index a86c12a0db7..7ec843180b8 100644 --- a/doc/emacs/display.texi +++ b/doc/emacs/display.texi @@ -1402,7 +1402,11 @@ right-to-left paragraphs. functionality especially in @code{prog-mode} and its descendants (@pxref{Major Modes}) to indicate the position of a specific column that has some special meaning for formatting the source code of a -program. +program. This assumes the buffer uses a fixed-pitch font, where all +the characters (with the possible exception of double-width +characters) have the same width on display. If the buffer uses +variable-pitch fonts, the fill-column indicators on different lines +might appear unaligned. To activate the fill-column indication display, use the minor modes @code{display-fill-@-column-indicator-mode} and diff --git a/doc/emacs/text.texi b/doc/emacs/text.texi index 3cc5f10582a..7037c8c943a 100644 --- a/doc/emacs/text.texi +++ b/doc/emacs/text.texi @@ -619,7 +619,12 @@ variable @code{fill-column}. The default value (@pxref{Locals}) is is to use the command @kbd{C-x f} (@code{set-fill-column}). With a numeric argument, it uses that as the new fill column. With just @kbd{C-u} as argument, it sets @code{fill-column} to the current -horizontal position of point. +horizontal position of point. Note that, by its very nature, +@code{fill-column} is measured in column units; the actual position of +that column on a graphical display depends on the font being used. In +particular, using variable-pitch fonts will cause the +@code{fill-column} occupy different horizontal positions on display in +different lines. @cindex centering @findex center-line |