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Document problem: slow screen refresh on missing font.

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See discussion of bug#22519 for more on this.
This commit is contained in:
Vincent Belaïche 2016-05-25 23:42:54 +02:00
parent 897fb6fa49
commit 0be672542a
1 changed files with 14 additions and 0 deletions
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etc/PROBLEMS
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@ -749,6 +749,20 @@ the following variables: tex-font-script-display (how much to
lower/raise); tex-suscript-height-ratio (how much smaller than
normal); tex-suscript-height-minimum (minimum height).
** Screen refresh is slow when there are special characters for which no suitable font is available
If the display is too slow in refreshing when you scroll to a new
region, or when you edit the buffer, it might be due to the fact that
some characters cannot be displayed in the default font, and Emacs is
spending too much time in looking for a suitable font to display them.
You can suspect this if you have several characters that are displayed
as small rectangles containing a hexadecimal code inside.
The solution is to install the appropriate fonts on your machine. For
instance if you are editing a text with a lot of math symbols, then
installing a font like 'Symbola' should solve this problem.
* Internationalization problems
** M-{ does not work on a Spanish PC keyboard.