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Clarify the use of left/right-margin-width in determining current margin width

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* doc/lispref/display.texi (Display-Margins):  Clarify that
left/right-margin-width can not be used to determine the current margin width,
and that window-margins must be used instead.
This commit is contained in:
Alan Mackenzie 2019-08-31 14:32:13 +00:00
parent 0c3fc71d3b
commit 8e420c09bc
1 changed files with 3 additions and 1 deletions
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doc/lispref/display.texi
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@ -4928,7 +4928,9 @@ means no right marginal area.
Setting these variables does not immediately affect the window. These
variables are checked when a new buffer is displayed in the window.
Thus, you can make changes take effect by calling
@code{set-window-buffer}.
@code{set-window-buffer}. Do not use these variables to try to
determine the current width of the left or right margin. Instead, use
the function @code{window-margins}.
You can also set the margin widths immediately.