be sure the position you specify is not ignored, specify a
non-@code{nil} value for the @code{user-position} parameter as well.
+If the window manager refuses to align a frame at the left or top screen
+edge, combining position notation and @code{user-position} as in
+
+@example
+(modify-frame-parameters
+ '((user-position . t) (left . (+ -4))))
+@end example
+
+may help to override that.
+
@vindex top, a frame parameter
@item top
The screen position of the top (or bottom) edge, in pixels, with respect