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-rw-r--r--doc/wm.n9
1 files changed, 9 insertions, 0 deletions
diff --git a/doc/wm.n b/doc/wm.n
index 93858ef..799057a 100644
--- a/doc/wm.n
+++ b/doc/wm.n
@@ -260,6 +260,15 @@ If \fInewGeometry\fR is specified as an empty string then any
existing user-specified geometry for \fIwindow\fR is cancelled, and
the window will revert to the size requested internally by its
widgets.
+.PP
+Note that this is related to \fBwinfo geometry\fR, but not the same. That can
+only query the geometry, and always reflects Tk's current understanding of the
+actual size and location of \fIwindow\fR, whereas \fBwm geometry\fR allows
+both setting and querying of the \fIwindow manager\fR's understanding of the
+size and location of the window. This can vary significantly, for example to
+reflect the addition of decorative elements to \fIwindow\fR such as title
+bars, and window managers are not required to precisely follow the requests
+made through this command.
.RE
.TP
\fBwm grid \fIwindow\fR ?\fIbaseWidth baseHeight widthInc heightInc\fR?