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Document `scroll-bar-adjust-thumb-portion'.

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Xue Fuqiao 2013-12-22 09:45:13 +08:00
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4
doc/emacs/ChangeLog
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@ -1,3 +1,7 @@
2013-12-22 Xue Fuqiao <xfq.free@gmail.com>
* frames.texi (Scroll Bars): Document `scroll-bar-adjust-thumb-portion'.
2013-12-21 Chong Yidong <cyd@gnu.org>
* indent.texi (Indentation Commands): Document C-x TAB changes.

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doc/emacs/frames.texi
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@ -930,6 +930,17 @@ or disable the scroll bars (@pxref{Resources}). To control the scroll
bar width, change the @code{scroll-bar-width} frame parameter
(@pxref{Frame Parameters,,, elisp, The Emacs Lisp Reference Manual}).
@vindex scroll-bar-adjust-thumb-portion
@cindex overscrolling
If you're using Emacs on X (with GTK+ or Motif), you can customize the
variable @code{scroll-bar-adjust-thumb-portion} to control
@dfn{overscrolling} of the scroll bar, i.e. dragging the thumb down even
when the end of the buffer is visible. If its value is
non-@code{nil}, the scroll bar can be dragged downwards even if the
end of the buffer is shown; if @code{nil}, the thumb will be at the
bottom when the end of the buffer is shown. You can not over-scroll
when the entire buffer is visible.
@node Drag and Drop
@section Drag and Drop
@cindex drag and drop

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etc/NEWS
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@ -179,6 +179,7 @@ As a command, it was a special case of `C-x 2' (`split-window-below'),
and as such superfluous. After being reimplemented in Lisp, its
interactive form was mistakenly retained.
+++
*** New option `scroll-bar-adjust-thumb-portion'.
Available only on X, this option allows to control over-scrolling
using the scroll bar (i.e. dragging the thumb down even when the end