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-rw-r--r--doc/scrollbar.n7
1 files changed, 5 insertions, 2 deletions
diff --git a/doc/scrollbar.n b/doc/scrollbar.n
index ba11f5c..4f808f4 100644
--- a/doc/scrollbar.n
+++ b/doc/scrollbar.n
@@ -223,7 +223,8 @@ it is slightly less than what fits in the window, so that there
is a slight overlap between the old and new views.
\fINumber\fR is either 1, which means the next page should
become visible, or \-1, which means that the previous page should
-become visible.
+become visible. Fractional number are rounded away from 0, so
+scrolling 0.001 pages has the same effect as scrolling 1 page.
.TP
\fIprefix \fBscroll \fInumber \fBunits\fR
.
@@ -232,7 +233,9 @@ The units are defined in whatever way makes sense for the widget,
such as characters or lines in a text widget.
\fINumber\fR is either 1, which means one unit should scroll off
the top or left of the window, or \-1, which means that one unit
-should scroll off the bottom or right of the window.
+should scroll off the bottom or right of the window. Fractional
+numbers are rounded away from 0, so scrolling 0.001 units has
+the same effect as scrolling 1 unit.
.SH "OLD COMMAND SYNTAX"
.PP
In versions of Tk before 4.0, the \fBset\fR and \fBget\fR widget