Clarify need for user-position to get left and top obeyed.

diff --git a/lispref/frames.texi b/lispref/frames.texi
index 48dc47bef968da4d4879dfb4efeccc29b3be4ac2..c0eb9d6aa9298b248d9040fcc58e34b6a5b9e14b 100644 (file)
--- a/lispref/frames.texi
+++ b/lispref/frames.texi
@@ -280,6 +280,10 @@ window with respect to the right edge of the screen.  A positive value
 of @var{pos} counts toward the left.  If the parameter is a negative
 integer @minus{}@var{pos} then @var{pos} is positive!
 
+Some window managers ignore program-specified positions.  If you want to
+be sure the position you specify is not ignored, specify a
+non-@code{nil} value for the @code{user-position} parameter as well.
+
 @item top
 The screen position of the top edge, in pixels, with respect to the
 top edge of the screen.  The value may be a positive number @var{pos},
@@ -292,6 +296,10 @@ window with respect to the bottom edge of the screen.  A positive value
 of @var{pos} counts toward the top.  If the parameter is a negative
 integer @minus{}@var{pos} then @var{pos} is positive!
 
+Some window managers ignore program-specified positions.  If you want to
+be sure the position you specify is not ignored, specify a
+non-@code{nil} value for the @code{user-position} parameter as well.
+
 @item icon-left
 The screen position of the left edge @emph{of the frame's icon}, in
 pixels, counting from the left edge of the screen.  This takes effect if