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Mention jit-lock deferred as an alternative to fast-but-imprecise-scrolling

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* doc/emacs/display.texi (Scrolling): Add a paragraph on using jit-lock
deferred fontification as a way of obviating Emacs hanging after
auto-repeated scrolling.
This commit is contained in:
Alan Mackenzie 2020-04-11 21:04:50 +00:00
parent fd27685c1e
commit cf57663f2a
1 changed files with 9 additions and 0 deletions
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doc/emacs/display.texi
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@ -141,6 +141,15 @@ default face. This can cause Emacs to scroll to somewhat wrong buffer
positions when the faces in use are not all the same size, even with
single (i.e., without auto-repeat) scrolling operations.
@vindex jit-lock-defer-time
As an alternative to setting @code{fast-but-imprecise-scrolling} you
might prefer to enable jit-lock deferred fontification (@pxref{Font
Lock}). To do this, customize @code{jit-lock-defer-time} to a small
positive number such as 0.25, or even 0.1 if you type quickly. This
gives you less jerky scrolling when you hold down @kbd{C-v}, but the
window contents after any action which scrolls into a fresh portion of
the buffer will be momentarily unfontified.
@vindex scroll-up
@vindex scroll-down
@findex scroll-up-line